2022/12/04 更新

写真a

ナカエ ヒデオ
中江 秀雄
所属
理工学術院
職名
名誉教授

学位

  • 工学博士

  • 博士(工学)

所属学協会

  •  
     
     

    日本金属学会

  •  
     
     

    軽金属学会

  •  
     
     

    日本鋳造工学会

  •  
     
     

    日本鉄鋼協会

  •  
     
     

    日本鋳物協会

 

研究分野

  • 金属材料物性

  • 材料加工、組織制御

  • 金属生産、資源生産

研究キーワード

  • 鋳造工学

  • 凝固工学

  • 金属材料

書籍等出版物

  • 材料プロセス工学(マテリアル工学シリーズ;6)

    朝倉書店  2003年

  • 鋳型材料と鉄合金の漏れ

    赤外線加熱工学ハンドブック/アグネ技術センター  2003年

  • ステンレス鋳鋼におけるセミフルモード法の実用化:New Semi-full Mold Process for stainless Steel Castings

    JACT NEWS  2003年

  • 総論鋳鉄の製造方法と材質、機械的性質、総論鋳鉄の製造方法と材質、溶解法

    鋳造工学便覧 日本鋳造工学会編 丸善㈱  2002年

  • 漏れ、その基礎と応用(その1)Fundamentals of wetting phenomena and applications, Part.1

    金属工学便覧  2002年

  • 漏れ、その基礎と応用(その2)Fundamentals of wetting phenomena and applications, Part.2

    金属工学便覧  2002年

  • 1980年代以降の鋳造品の生産動向

    鉄鋼便覧  2002年

  • 金属便覧 日本金属学会編 「溶解法と溶湯処理」

    丸善株式会社  2000年

  • 金属便覧 日本金属学会編 「凝固組織」

    丸善株式会社  2000年

  • Casting

    1999年

  • Influence of Ca on Modification of Si in Al-Si Alloys-Interfacial Energy and Solidification Structure-

    The Second Oxford Kobe Materials Seminar : Solidification and Casting  1999年

  • Casting

    1999年

  • Influence of Ca on Modification of Si in Al-Si Alloys-Interfacial Energy and Solidification Structure-

    The Second Oxford Kobe Materials Seminar : Solidification and Casting  1999年

▼全件表示

Misc

  • Influence of Melting Conditions on Graphite Morphology in Spheroidal Graphite Cast Iron Using Ni-C Morphology in Spheroidal Graphite Cast Iron Using Ni-C Alloys

    Trans Tech Publications,Switzerland   457   33 - 42  2011年

  • Influence of Ti on Graphite Morphological Transition in Flake Graphite Cast Iron

    Hideo Nakaee, Kyohei Fujimoto

    SCIENCE AND PROCESSING OF CAST IRON IX   457   25 - +  2011年

     概要を見る

    The morphological transition from the A-type to D-type graphite (undercooled graphite) in cast iron has been studied using Fe-3.5%C-2.0%Si-0/0.1%Ti samples. The samples were prepared using a high frequency induction furnace flowing Ar atmosphere using 0.25% steel rods with or without Ti addition. The samples had Ti contents that ranged from 0 to 0.10% at 5 different levels by the addition of sponge titanium. The cooling curves of these melts were measured in a shell mold with an inside diameter of 30mm and 50mm height and in four BN-coated steel cup molds with a volume of 30ml each. The cooling curves were measured by CA thermocouples located at the center. The cooling curves were differentiated to determine the transition points, namely the onset and end points of the eutectic solidification. Three out of the four samples, solidifying in steel molds, were quenched during the eutectic solidification and their macro-structures and micro-structures were observed for the determining the solidification mode.
    The volume fractions of the D-type graphite area in the samples were measured using 30 microscope images of 50x magnification, and their eutectic temperature was also determined using their cooling curves. The volume fraction of the shell mold samples increased with the Ti addition from 5% to 55%, and if the Ti content was greater than 0.05%, the acceleration occurred with their maximum undercooling, Delta T-MAX. The critical undercooling temperature, T-A/D, and the critical solidification rate, R-A/D, of the A-type to D-type graphite transition were determined by comparing the volume fractions to the solidification time. The Delta T-MAX and T-A/D values increased with the Ti addition. This is the main reason why the Ti addition accelerates the D-type graphite increase.

    DOI

  • 専修寺御影堂の瓦釘の材質調査

    中江 秀雄, 安井 純一, 峯田 元治

    「鉄と鋼」   97 ( 1 ) 7 - 11  2011年

    DOI CiNii

  • Influence of Melting Conditions on Graphite Morphology in Spheroidal Graphite Cast Iron Using Ni-C Morphology in Spheroidal Graphite Cast Iron Using Ni-C Alloys

    Trans Tech Publications,Switzerland   457   33 - 42  2011年

  • Influence of Ti on Graphite Morphological Transition in Flake Graphite Cast Iron

    Hideo Nakaee, Kyohei Fujimoto

    SCIENCE AND PROCESSING OF CAST IRON IX   457   25 - +  2011年

     概要を見る

    The morphological transition from the A-type to D-type graphite (undercooled graphite) in cast iron has been studied using Fe-3.5%C-2.0%Si-0/0.1%Ti samples. The samples were prepared using a high frequency induction furnace flowing Ar atmosphere using 0.25% steel rods with or without Ti addition. The samples had Ti contents that ranged from 0 to 0.10% at 5 different levels by the addition of sponge titanium. The cooling curves of these melts were measured in a shell mold with an inside diameter of 30mm and 50mm height and in four BN-coated steel cup molds with a volume of 30ml each. The cooling curves were measured by CA thermocouples located at the center. The cooling curves were differentiated to determine the transition points, namely the onset and end points of the eutectic solidification. Three out of the four samples, solidifying in steel molds, were quenched during the eutectic solidification and their macro-structures and micro-structures were observed for the determining the solidification mode.
    The volume fractions of the D-type graphite area in the samples were measured using 30 microscope images of 50x magnification, and their eutectic temperature was also determined using their cooling curves. The volume fraction of the shell mold samples increased with the Ti addition from 5% to 55%, and if the Ti content was greater than 0.05%, the acceleration occurred with their maximum undercooling, Delta T-MAX. The critical undercooling temperature, T-A/D, and the critical solidification rate, R-A/D, of the A-type to D-type graphite transition were determined by comparing the volume fractions to the solidification time. The Delta T-MAX and T-A/D values increased with the Ti addition. This is the main reason why the Ti addition accelerates the D-type graphite increase.

    DOI

  • Ni-C合金の黒鉛形態と冷却曲線に及ぼす添加元素の影響

    立澤 吉紹, 中江 秀雄

    鋳造工学   82 ( 2 ) 212 - 217  2010年04月

     概要を見る

    The influence of alloying elements on graphite morphology and cooling curves was studied using Ni-C eutectic alloys. Ninety grams of Ni-C parent alloys, prepared using high purity metals, was melted in an Ar atmosphere at 1500°C and cooled at the rate of 40K/min. Their cooing curves were monitored every 0.1s using a B-type thermocouple located at the center of the samples. The graphite morphologies of the samples were observed using an SEM and optical microscope. <br>  Experimental results showed that spheroidal graphite formed after the crystallization of chunky graphite. This phenomenon completely differed from that of the Fe-C alloys, in which after the spheroidal formation the chunky graphite crystallizes. These results were confirmed by the cooling curves and microstructure.

    DOI CiNii

  • 水モデルによる湯流れ速度に及ぼす通気度とガス種の影響

    中江 秀雄, 渡辺 めぐみ

    鋳造工学   82 ( 1 ) 3 - 7  2010年

     概要を見る

    The aim of this study was to fabricate thin and light castings to realize an energy saving highly efficient society. High melt flow rate in a mold cavity is indispensable for the production of thin castings. However, until now, the flow ability of melt has been studied mainly by investigating flow length, but the flow rate is thought to be more important and affected by permeability, specific heat of sand mold, and atmosphere. Consequently, the influence of permeability, atmosphere, air, CO2, and He on the flow rate was investigated using a fine Teflon tube with pure water system in this study. <br>  The results show that the flow rate is significantly affected by permeability and gas species, and is the fastest in a He atmosphere, followed by air and CO2. These results show that the flow rate is a function of the specific density of gases and is not the function of kinetic viscosity.

    DOI CiNii

  • パーライト基地球状黒鉛鋳鉄のほう素によるフェライト化機構

    五十嵐 芳夫, 秋山 昇一, 菅野 利猛, 姜 一求, 中江 秀雄, 堀江 皓, 平塚 貞人, 藤川 貴郎

    鋳造工学   82 ( 1 ) 16 - 22  2010年

     概要を見る

    The influence of boron on the ferrite formation in pearlite matrix spheroidal graphite cast iron has been investigated using the advanced analytical equipments such as an SEM and a TEM. The surface of spheroidal graphite in the bulls eye structure, produced by the addition of quite small amount of boron, was analyzed for discussing the ferritizing mechanism. <br>  The microstructure in the spheroidal graphite was investigated using the SEM and TEM, and we found the triangular precipitates, consisted of Fe-Si-Cu-B size of 150nm, in the surface layer of the graphite. These precipitates are consisted of the nano-crystal and act as the nucleus sites of flake graphite size of 0.5μm. The formation of the flake graphite due to the ferritizing above their eutectoid temperature, is the key mechanism of the ferrite formation.

    DOI CiNii

  • Role of Oxide Particles in Aluminum Melt toward Aluminum Foam Fabrication by the Melt Route

    Trans Tech Publications,Switzerland     385 - 390  2010年

  • 発泡アルミニウム製造における気泡安定性と粒子物性の関係

    門井 浩太, 中江 秀雄

    鋳造工学   82 ( 3 ) 149 - 156  2010年

     概要を見る

    In order to experimentally elucidate foam stabilizing factors in aluminum foam fabrication, the contribution of solid particles in the liquid to increasing viscosity and stabilizing foam was investigated using both solution and aluminum melt. Regardless of the type liquid, the wettability and shape of solid particle showed opposite effects between thickening and foam stability. Even though a poor wettable particle contributes effectively to enhancing the liquid viscosity, the particle leads to the collapse of the foam cell because it acts like a notch in terms of foam stabilization, because of poor energy balance at the interface between solid and liquid. For this reason, it is important to take into account not only the relative viscosity but also the physical properties of solid particle for the fabrication of fine aluminum foams.

    DOI CiNii

  • Al-Ni共晶合金の凝固組織に及ぼす重力の影響

    松永 宇祥, 門井 浩太, 中江 秀雄

    日本金属学会誌   74 ( 4 ) 231 - 236  2010年

    DOI CiNii

  • Al-Si共晶合金の共晶組織改良処理に及ぼすりん含有量の影響

    門井 浩太, 大開 智哉, 草本 佑記, 中江 秀雄

    鋳造工学   82 ( 4 ) 203 - 211  2010年

     概要を見る

    In order to examine eutectic solidification in Al-Si alloy, the role of the purity of Al-Si alloy and the eutectic modification agent, strontium or sodium, on eutectic solidification sequences was investigated by a technique of quenching during eutectic reaction. <br>  If Al-Si alloy contains more than a few ppm of phosphorous (commercial purity alloys), eutectic cells in Al-Si alloy melt grow on centrally-located polygonal silicon which nucleates on AlP particles. However, nucleation of eutectic cells tends to be difficult within the melt with sodium addition due to low phosphorous content, even though the sample is made of identical commercial purity start materials. In the case of samples containing little phosphorous, eutectic phases tend to nucleate on the mold surface and grow in the opposite direction of the heat flow. <br>  Addition of strontium or sodium results in the morphology of eutectic silicon, which acts as the leading phase of eutectic coupled growth and promotes transition from plate to fiber (coral) shape with decreased anisotropy. This causes eutectic aluminum to grow according to the crystal orientation of the eutectic silicon in unmodified melt, but grow freely with subgrain formations in modified melt. <br>  These results reveal that eutectic solidification of Al-Si alloy is controlled by the nucleation frequency of eutectic cells depending on phosphorous content and decrease in the anisotropy of eutectic silicon due to modification.

    DOI CiNii

  • 溶解金属を用いた金属加工法と人材育成

    SOKEIZAI   51 ( 7 ) 35 - 36  2010年

  • 共晶凝固の基礎

    中江 秀雄

    鋳造工学   82 ( 7 ) 454 - 459  2010年

    CiNii

  • 片状黒鉛鋳鉄の凝固

    鋳造工学   82 ( 8 ) 508 - 512  2010年

  • 球状黒鉛鋳鉄の凝固

    鋳造工学   82 ( 9 ) 590 - 595  2010年

  • Microstructure of Casting High-Silicon Alminum Alloy with Additions of Co and RE

    Proceedings of 69th World Foundry Congress     216 - 219  2010年

  • Influence of Si,Ce,Sb and Sn on Chunky Graphite Formation

    Proceedings of 69th World Foundry Congress     393 - 397  2010年

  • Role of Oxide Particles in Aluminum Melt toward Aluminum Foam Fabrication by the Melt Route

    Trans Tech Publications,Switzerland     385 - 390  2010年

  • Microstructure of Casting High-Silicon Alminum Alloy with Additions of Co and RE

    Proceedings of 69th World Foundry Congress     216 - 219  2010年

  • Influence of Si,Ce,Sb and Sn on Chunky Graphite Formation

    Proceedings of 69th World Foundry Congress     393 - 397  2010年

  • Heat Treatment of TiH2 Powder to Control Decomposition Phenomenon for Aluminum Foam Fabrication by Melt Route

    Kota Kadoi, Norbert Babcsan, Hideo Nakae

    MATERIALS TRANSACTIONS   50 ( 4 ) 727 - 733  2009年04月

     概要を見る

    TiH2 powder has been used to fabricate aluminum foams its a blowing agent for more than two decades. The aim of this paper is to understand the detailed decomposition behavior of TiH2 powder and to control the phenomenon by a heat treatment for the fabrication of fine foams by the melt route. TiH2 powders whose qualities were different, were characterized using TG-DTA and XRD. As heat treatment factors. temperature and time were applied. We have found differences in the decomposition behavior between the as-received Tilt, powders. Regardless of quality of TiH2, powder. increasing temperature and time of the heat treatment in air elevates the decomposition temperature and decreases the amount of released hydrogen during reheating due to the oxide barrier layer formed on the powder surface. The influence of the heat treatment temperature on the decomposition modification is more significant than that of the little. To control the decomposition phenomenon of TiH2 powder, the heat treatment condition has to be optimized taking into account the quality and the purity of the powder. [doi: 10.2320/matertrans.MBW200829]

    DOI CiNii

  • Heat Treatment of TiH2 Powder to Control Decomposition Phenomenon for Aluminum Foam Fabrication by Melt Route

    Kota Kadoi, Norbert Babcsan, Hideo Nakae

    MATERIALS TRANSACTIONS   50 ( 4 ) 727 - 733  2009年04月

     概要を見る

    TiH2 powder has been used to fabricate aluminum foams its a blowing agent for more than two decades. The aim of this paper is to understand the detailed decomposition behavior of TiH2 powder and to control the phenomenon by a heat treatment for the fabrication of fine foams by the melt route. TiH2 powders whose qualities were different, were characterized using TG-DTA and XRD. As heat treatment factors. temperature and time were applied. We have found differences in the decomposition behavior between the as-received Tilt, powders. Regardless of quality of TiH2, powder. increasing temperature and time of the heat treatment in air elevates the decomposition temperature and decreases the amount of released hydrogen during reheating due to the oxide barrier layer formed on the powder surface. The influence of the heat treatment temperature on the decomposition modification is more significant than that of the little. To control the decomposition phenomenon of TiH2 powder, the heat treatment condition has to be optimized taking into account the quality and the purity of the powder. [doi: 10.2320/matertrans.MBW200829]

    DOI CiNii

  • Influence of Solidification Rate on Graphite Morphological Change in Cast Iron

    Processing Materials for Properties     1085 - 1090  2009年

  • 江戸後期の鋳鉄大砲

    季刊 考古学   ( 109 ) 69 - 72  2009年

  • Influence of Solidification Rate on Graphite Morphological Change in Cast Iron

    Processing Materials for Properties     1085 - 1090  2009年

  • Equilibrium and non-equilibrium wetting

    H. Nakae, Y. Koizumi

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   495 ( 1-2 ) 113 - 118  2008年11月

     概要を見る

    The influence of mass transfer and chemical reactions on wetting has been studied using metal systems and aqueous solution systems to determine the equilibrium wetting. The influence of mass transfer on wetting has been studied using Al/Si systems and aqueous solution/NaCl systems and the influence of chemical reactions is discussed using Al/Ni systems and aqueous solution/B2O3 systems. The reaction products in the Al/Ni system change with temperature to NiAl3, Ni2Al3 and NiAl, and the reaction product for the aqueous solution/B2O3 system is B(OH)(3). also discuss the influence of relative humidity on wetting in the aqueous solution systems. The results show that the contact angle is highest under equilibrium humidity conditions. (C) 2008 Published by Elsevier B.V.

    DOI

  • Equilibrium and non-equilibrium wetting

    H. Nakae, Y. Koizumi

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   495 ( 1-2 ) 113 - 118  2008年11月

     概要を見る

    The influence of mass transfer and chemical reactions on wetting has been studied using metal systems and aqueous solution systems to determine the equilibrium wetting. The influence of mass transfer on wetting has been studied using Al/Si systems and aqueous solution/NaCl systems and the influence of chemical reactions is discussed using Al/Ni systems and aqueous solution/B2O3 systems. The reaction products in the Al/Ni system change with temperature to NiAl3, Ni2Al3 and NiAl, and the reaction product for the aqueous solution/B2O3 system is B(OH)(3). also discuss the influence of relative humidity on wetting in the aqueous solution systems. The results show that the contact angle is highest under equilibrium humidity conditions. (C) 2008 Published by Elsevier B.V.

    DOI

  • Influence of inoculation on solidification in cast iron

    H. Nakae

    International Journal of Cast Metals Research   21 ( 1-4 ) 7 - 10  2008年08月

     概要を見る

    Inoculation of cast iron has been mainly studied for the nucleus materials and the development of new inoculants. The effect is widely recognised
    nevertheless, the mechanism was not fully understood. Inoculation leads to a decrease in chill depth, depressed the formation of D type graphite to form A type graphite and increase in the eutectic cell number. The transition from A type to the D type graphite is also accelerated by Ti addition
    therefore we used Ti added samples for the study of D type graphite formation. The increase in the eutectic cell number produces a decrease in the cell size, namely the radius
    nevertheless, the solidification time of the castings does not change by inoculation. Therefore, the solidification rate of the cell, namely the linear solidification rate, should decrease with inoculation and the decrease produces a depression in the chill and D type graphite due to the smaller undercooling. Therefore, we have to consider the three-dimensional solidification rate for discussing the cooling curve. © 2008 W. S. Maney &amp
    Son Ltd.

    DOI

  • Influence of heat treatment on matrix structures in cast iron

    B. -R. Zhao, S. Ueno, S. Yamada, K. Sugita, H. Nakae

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   21 ( 1-4 ) 62 - 66  2008年08月

     概要を見る

    Flake graphite cast iron (FC) samples containing 2%Si, in which the S contents changed from 0.006 to 0.076%, were heated at 1123 to 1323 K and then cooled to determine the pearlite morphological change, namely lamellar or granular. For the spheroidal graphite cast iron (FCD) samples, the P contents changed from 0 to 0.2% and those of Sn were from 0 to 0.06% with 0.5% Cu using the 2.5% Si and 0.3% Mn iron.
    The pearlite morphology of the FC samples cooled from 1123 K was granular. The pearlite structure of the Sn-FCD samples was also granular, when cooled from 973 and 1023 K, and that of P-FCD was granular only in the sample cooled from 1023 K, otherwise the morphology was lamellar.
    The pearlite morphology of FC and FCD samples depends on the solubility of C in the austenite which can be varied by the heating temperature. This mechanism is identical to that of the lamellar to rod transition in eutectic alloys.

    DOI

  • Influence of hydrogen levels on porosity and mechanical properties of Mg alloy castings

    S. S. Wu, S. X. Xu, P. An, Y. Fukuda, H. Nakae

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   21 ( 1-4 ) 100 - 104  2008年08月

     概要を見る

    The effects of hydrogen levels on microstructure of porosity and mechanical properties of magnesium alloy castings were investigated. The hydrogen content of AZ91 alloy melt under Ar+HFC-134a mixed gas protection was 103 cm(3) kg(-1), which was less than that of 139 cm(3) kg(-1) under flux protection, therefore the effect of gas protection was better. The porosity ratio in microstructure of castings melted under gas protection was 1.8%, which was also less than that of 2.6% under flux protection. The hydrogen content of melt under flux protection and degassed with Ar gas was 70 cm(3) kg(-1), and the corresponding porosity ratio in microstructure of castings was only 0.6%. The density of the samples was increased with decreasing hydrogen content. The tensile strength of AZ91 alloy casting sample under flux protection and degassed with Ar gas was 21% higher than that of undegassed one, and the elongation was also 50% higher.

    DOI

  • Influence of inoculation on solidification in cast iron

    H. Nakae

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   21 ( 1-4 ) 7 - 10  2008年08月

     概要を見る

    Inoculation of cast iron has been mainly studied for the nucleus materials and the development of new inoculants. The effect is widely recognised; nevertheless, the mechanism was not fully understood. Inoculation leads to a decrease in chill depth, depressed the formation of D type graphite to form A type graphite and increase in the eutectic cell number. The transition from A type to the D type graphite is also accelerated by Ti addition; therefore we used Ti added samples for the study of D type graphite formation. The increase in the eutectic cell number produces a decrease in the cell size, namely the radius; nevertheless, the solidification time of the castings does not change by inoculation. Therefore, the solidification rate of the cell, namely the linear solidification rate, should decrease with inoculation and the decrease produces a depression in the chill and D type graphite due to the smaller undercooling. Therefore, we have to consider the three-dimensional solidification rate for discussing the cooling curve.

    DOI

  • Influence of heat treatment on matrix structures in cast iron

    B. -R. Zhao, S. Ueno, S. Yamada, K. Sugita, H. Nakae

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   21 ( 1-4 ) 62 - 66  2008年08月

     概要を見る

    Flake graphite cast iron (FC) samples containing 2%Si, in which the S contents changed from 0.006 to 0.076%, were heated at 1123 to 1323 K and then cooled to determine the pearlite morphological change, namely lamellar or granular. For the spheroidal graphite cast iron (FCD) samples, the P contents changed from 0 to 0.2% and those of Sn were from 0 to 0.06% with 0.5% Cu using the 2.5% Si and 0.3% Mn iron.
    The pearlite morphology of the FC samples cooled from 1123 K was granular. The pearlite structure of the Sn-FCD samples was also granular, when cooled from 973 and 1023 K, and that of P-FCD was granular only in the sample cooled from 1023 K, otherwise the morphology was lamellar.
    The pearlite morphology of FC and FCD samples depends on the solubility of C in the austenite which can be varied by the heating temperature. This mechanism is identical to that of the lamellar to rod transition in eutectic alloys.

    DOI

  • Influence of hydrogen levels on porosity and mechanical properties of Mg alloy castings

    S. S. Wu, S. X. Xu, P. An, Y. Fukuda, H. Nakae

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   21 ( 1-4 ) 100 - 104  2008年08月

     概要を見る

    The effects of hydrogen levels on microstructure of porosity and mechanical properties of magnesium alloy castings were investigated. The hydrogen content of AZ91 alloy melt under Ar+HFC-134a mixed gas protection was 103 cm(3) kg(-1), which was less than that of 139 cm(3) kg(-1) under flux protection, therefore the effect of gas protection was better. The porosity ratio in microstructure of castings melted under gas protection was 1.8%, which was also less than that of 2.6% under flux protection. The hydrogen content of melt under flux protection and degassed with Ar gas was 70 cm(3) kg(-1), and the corresponding porosity ratio in microstructure of castings was only 0.6%. The density of the samples was increased with decreasing hydrogen content. The tensile strength of AZ91 alloy casting sample under flux protection and degassed with Ar gas was 21% higher than that of undegassed one, and the elongation was also 50% higher.

    DOI

  • Formation mechanism of chunky graphite and its preventive measures

    Hideo Nakae, Sanghoon Jung, Ho-Chul Shin

    JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   24 ( 3 ) 289 - 295  2008年05月

     概要を見る

    The formation mechanism of chunky graphite has been reviewed and studied. The study consisted of a unidirectional solidification method, a small droplet method and a furnace cooling method. Four kinds of iron samples were prepared, namely, the pure Fe-C, Fe-C-S, Fe-C-Ce and Fe-C-Si-Ce alloys, and three kinds of nickel samples, namely the Ni-C, Ni-C-S and Ni-C-Mg alloys. The results of the unidirectional solidification of the Ni-C alloys showed that spheroidal graphite is not observed in the continuous solidified region, in which only flake-like graphite is observed, while spheroidal graphite is usually observed in the quenched liquid region. The existence of spheroidal graphite in the solidified phase is recognized only in the discontinuous growth mode of the Ni-C-Mg alloy solidified at 150 mm/h. This means that the spheroidal graphite is directly crystallized from the melt and entrapped by the flake-like chunky graphite that is formed by the continuous growth mode. In the small droplet method, a small piece of the Fe-C or Fe-C-Ce sample was melted on a pure graphite plate then cooled at a different cooling rate in a He-3%H-2 atmosphere. The graphite in the Fe-C-Ce alloy is usually spherical. Nevertheless, the graphite morphology of the final solidified area changed from spherical to chunky and chunky to ledeburite with an increase in the cooling rate. This means that the chunky graphite is formed in the residual liquid region by the solidification into Fe-graphite system. The sample was cooled in a furnace, and the graphite morphology changes from spherical to chunky and chunky to ledeburite with the decrease in the Si content. These phenomena can be confirmed by the cooling curves of these samples.

  • Formation mechanism of chunky graphite and its preventive measures

    Hideo Nakae, Sanghoon Jung, Ho-Chul Shin

    JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   24 ( 3 ) 289 - 295  2008年05月

     概要を見る

    The formation mechanism of chunky graphite has been reviewed and studied. The study consisted of a unidirectional solidification method, a small droplet method and a furnace cooling method. Four kinds of iron samples were prepared, namely, the pure Fe-C, Fe-C-S, Fe-C-Ce and Fe-C-Si-Ce alloys, and three kinds of nickel samples, namely the Ni-C, Ni-C-S and Ni-C-Mg alloys. The results of the unidirectional solidification of the Ni-C alloys showed that spheroidal graphite is not observed in the continuous solidified region, in which only flake-like graphite is observed, while spheroidal graphite is usually observed in the quenched liquid region. The existence of spheroidal graphite in the solidified phase is recognized only in the discontinuous growth mode of the Ni-C-Mg alloy solidified at 150 mm/h. This means that the spheroidal graphite is directly crystallized from the melt and entrapped by the flake-like chunky graphite that is formed by the continuous growth mode. In the small droplet method, a small piece of the Fe-C or Fe-C-Ce sample was melted on a pure graphite plate then cooled at a different cooling rate in a He-3%H-2 atmosphere. The graphite in the Fe-C-Ce alloy is usually spherical. Nevertheless, the graphite morphology of the final solidified area changed from spherical to chunky and chunky to ledeburite with an increase in the cooling rate. This means that the chunky graphite is formed in the residual liquid region by the solidification into Fe-graphite system. The sample was cooled in a furnace, and the graphite morphology changes from spherical to chunky and chunky to ledeburite with the decrease in the Si content. These phenomena can be confirmed by the cooling curves of these samples.

  • Formation of non-dendritic microstructure of semi-solid aluminum alloy under vibration

    Shusen Wu, Lizhi Xie, Junwen Zhao, H. Nakae

    SCRIPTA MATERIALIA   58 ( 7 ) 556 - 559  2008年04月

     概要を見る

    A new technique of introducing mechanical vibration during isothermal holding period of hypoeutectic Al-Si alloy to prepare semi-solid slurry has been studied. The convection of melt caused by vibration had notable effects on the formation of near-spherical primary Al particles. When the vibrating frequency increased from 11.7 to 33.3 Hz, the average diameter of non-dendritic primary particles decreased from 125 to 90 gm, and the average shape coefficient increased from 0.40 to 0.55. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    DOI

  • Formation of non-dendritic microstructure of semi-solid aluminum alloy under vibration

    Shusen Wu, Lizhi Xie, Junwen Zhao, H. Nakae

    SCRIPTA MATERIALIA   58 ( 7 ) 556 - 559  2008年04月

     概要を見る

    A new technique of introducing mechanical vibration during isothermal holding period of hypoeutectic Al-Si alloy to prepare semi-solid slurry has been studied. The convection of melt caused by vibration had notable effects on the formation of near-spherical primary Al particles. When the vibrating frequency increased from 11.7 to 33.3 Hz, the average diameter of non-dendritic primary particles decreased from 125 to 90 gm, and the average shape coefficient increased from 0.40 to 0.55. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    DOI

  • Critical conditions for formation of spheroidal graphite

    Sanghoon Jung, Takashi Ishikawa, Hideo Nakae

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   476 ( 1-2 ) 350 - 356  2008年03月

     概要を見る

    The influence of the interfacial energy between the Fe-C melt and basal plane of graphite, YGr/L, and the cooling rate on the formation of spheroidal graphite was investigated as a function of the sulfur content in cast iron using the sessile drop method in a He-3% H-2 atmosphere. The result showed that the gamma(Gr/L) decreased from 2.62 to 1.48 J/m(2) with an increase in the sulfur. The corresponding surface energy of the graphite, gamma(Gr/V), also varied from 1.17 to 0.65 J/m(2). It is found that the spheroidal graphite is formed when the gamma(Gr/V) is greater than 2.5 J/m(2), which is the critical interfacial energy of the spheroidal graphite formation. In addition, the cooling rate is also an important factor for producing the spheroidal graphite in the Fe-C alloy. The present study clearly shows that the critical cooling rate is a function of the sulfur content, namely gamma(Gr/V), in the Fe-C melt. (c) 2007 Elsevier B.V. All rights reserved.

    DOI

  • Critical conditions for formation of spheroidal graphite

    Sanghoon Jung, Takashi Ishikawa, Hideo Nakae

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   476 ( 1-2 ) 350 - 356  2008年03月

     概要を見る

    The influence of the interfacial energy between the Fe-C melt and basal plane of graphite, YGr/L, and the cooling rate on the formation of spheroidal graphite was investigated as a function of the sulfur content in cast iron using the sessile drop method in a He-3% H-2 atmosphere. The result showed that the gamma(Gr/L) decreased from 2.62 to 1.48 J/m(2) with an increase in the sulfur. The corresponding surface energy of the graphite, gamma(Gr/V), also varied from 1.17 to 0.65 J/m(2). It is found that the spheroidal graphite is formed when the gamma(Gr/V) is greater than 2.5 J/m(2), which is the critical interfacial energy of the spheroidal graphite formation. In addition, the cooling rate is also an important factor for producing the spheroidal graphite in the Fe-C alloy. The present study clearly shows that the critical cooling rate is a function of the sulfur content, namely gamma(Gr/V), in the Fe-C melt. (c) 2007 Elsevier B.V. All rights reserved.

    DOI

  • 発泡アルミニウム製造におけるアルミニウム溶湯の増粘機構

    門井 浩太, 中江 秀雄

    金属学会誌   72 ( 2 ) 73 - 79  2008年

    DOI

  • Influence of Hydrogen Levels on Porosity and Mechanical Properties of Mg Alloy Castings

    Proceeding of AFC-10     42 - 47  2008年

  • Influence of Inoculation on Solidification in Cast Iron

    Proceeding of AFC-10     67 - 71  2008年

  • Cooling Curve and Graphite Morphology in Ni-C Alloys

    Proceeding of AFC-10     155 - 159  2008年

  • Influence of heat treatment on matrix structures in cast iron

    Proceeding of AFC-10     400 - 405  2008年

  • 球状黒鉛鋳鉄の基地組織に及ぼすりん、すず、量及び熱処理の影響

    鋳造工学   80 ( 3 ) 149 - 155  2008年

    DOI

  • 最新の鋳造技術の現状と動向

    自動車技術   62 ( 3 ) 26 - 30  2008年

  • Methodology for the In-situ Observation of Alporas Foams Using X-ray Radioscopy

    Proceeding of The 5th Porous Metals and Metallic Foams 2007     111 - 113  2008年

  • 鋳造技術分野ロードマップの概要

    素形材   50   62 - 67  2008年

  • Influence of Hydrogen Levels on Porosity and Mechanical Properties of Mg Alloy Castings

    Proceeding of AFC-10     42 - 47  2008年

  • Influence of Inoculation on Solidification in Cast Iron

    Proceeding of AFC-10     67 - 71  2008年

  • Cooling Curve and Graphite Morphology in Ni-C Alloys

    Proceeding of AFC-10     155 - 159  2008年

  • Influence of heat treatment on matrix structures in cast iron

    Proceeding of AFC-10     400 - 405  2008年

  • Methodology for the In-situ Observation of Alporas Foams Using X-ray Radioscopy

    Proceeding of The 5th Porous Metals and Metallic Foams 2007     111 - 113  2008年

  • Eutectic solidification mode of spheroidal graphite cast iron and graphitization

    Hideo Nakae, Sanghoon Jung, Takayuki Kitazawa

    CHINA FOUNDRY   4 ( 1 ) 34 - 37  2007年02月

     概要を見る

    The shrinkage and chilling tendency of spheroidal graphite (abbreviated SG) cast iron is much greater than that of the flake graphite cast iron in spite of its higher amount of C and Si contents. Why? The main reason should be the difference in their graphitization during the eutectic solidification. In this paper, we discuss the difference in the solidification mechanism of both cast irons for solving these problems using unidirectional solidification and the cooling curves of the spheroidal graphite cast iron. The eutectic solidification rate of the SG cast iron is controlled by the diffusion of carbon through the austenite shell, and the final thickness is 1.4 times the radius of the SG, therefore, the reduction of the SG size, namely, the increase in the number, is the main solution of these problems.

  • Eutectic solidification mode of spheroidal graphite cast iron and graphitization

    Hideo Nakae, Sanghoon Jung, Takayuki Kitazawa

    CHINA FOUNDRY   4 ( 1 ) 34 - 37  2007年02月

     概要を見る

    The shrinkage and chilling tendency of spheroidal graphite (abbreviated SG) cast iron is much greater than that of the flake graphite cast iron in spite of its higher amount of C and Si contents. Why? The main reason should be the difference in their graphitization during the eutectic solidification. In this paper, we discuss the difference in the solidification mechanism of both cast irons for solving these problems using unidirectional solidification and the cooling curves of the spheroidal graphite cast iron. The eutectic solidification rate of the SG cast iron is controlled by the diffusion of carbon through the austenite shell, and the final thickness is 1.4 times the radius of the SG, therefore, the reduction of the SG size, namely, the increase in the number, is the main solution of these problems.

  • 発泡アルミニウム合金の製造と水素気泡の成長機構

    門井浩太, 中江秀雄

    鋳造工学   79 ( 1 ) 3 - 8  2007年

     概要を見る

    The significant features of closed cell aluminum foams are low density, high specific strength, high energy absorption, etc. These advantages are affected by the size, shape, and uniformity of cells in the foam. In order to improve the cellular structure of metal foams, foam stability of liquid metals to prevent rapture and drainage events has to be understood and controlled. A clear understanding of factors is therefore expected to improve quality and process control more easily. <br>  In this study, the influence of the temperature for adding foaming agent viscosity of the melt on foamability, and the growing mechanism of hydrogen bubbles in aluminum melt were investigated. Aluminum alloy foams were fabricated using the powder decomposition in the melt process and the unidirectional solidification method. As starting materials, Al-25mass%Cu-5mass%Si and Al-12.6mass%Si alloys were used. It was found that the temperature of foaming agent addition affected the number of cells and cell wall thickness. This effect was greater than those of viscosity and alloy components. Namely, the drainage of the liquid in foam film is the main factor for fabricating fine aluminum foam effectively.

    DOI CiNii

  • Growth of multi-elements complex coating on AZ91D magnesium alloy through conversion treatment

    Ming Zhao, Shusen Wu, Ping An, Y. Fukuda, H. Nakae

    JOURNAL OF ALLOYS AND COMPOUNDS   427 ( 1-2 ) 310 - 315  2007年01月

     概要を見る

    The growth process of a new chromium-free multi-elements complex coating (MECC) on AZ91D magnesium alloy has been studied. The morphology and phase composition of the coatings have been determined with SEM, EDX, XRD and AFM. In addition, the thickness change of MECC layer and weight change of the specimen have been measured. On the basis of these experimental results, the coating formation is divided into initial stage, metaphase stage and late stage. At the initial stage, the compact coating is an amorphous material composed of O, Mg, Al and P. Meanwhile, coating growth is fast and mass-gain in unit area is negative owing to severe corrosion. At the metaphase stage, the coating layer consists of amorphous material of O, Mg, Al, P, Mn, and crystalline Mn5.65P3, (Mg0.66Al0.34) (Al0.83Mg0.17)(2)O-4, and the mass-gain in unit area decreases and coating quality degenerates. At the late stage, with the quantity increase of crystalline Mn5.65P3, (Mg0.66Al0.34) (Al0.83Mg0.17)(2)O-4, the coating surface becomes smooth and compact, and the coating grows into steady condition. (c) 2006 Elsevier B.V. All rights reserved.

    DOI CiNii

  • 金属材料と人間 歴史的経緯と必然性

    日立金属技報   23   5 - 6  2007年

  • 鋳鉄の濡れが湯流れに及ぼす影響の水モデルによる検討

    中江秀雄, 太田浩介, 佐藤健二

    鋳造工学   79 ( 6 ) 285 - 290  2007年

     概要を見る

    The influence of wettability between molten metal and mold materials on fluidity has been studied using glass and Teflon fine tubes/aqua-solutions system. For the discussion of work of adhesion and external pressure at the tip of flow on fluidity, flow rates were measured in laminar flow conditions. Flow was induced by the suction of solution with reduced pressure. The flow rate was calculated from images of a high speed video recorder. The inside diameter of the tubes was changed from 1.8mm to 4.0mm. The contact angle (wettability) was changed by the combination of tube materials and addition of a surfactant into pure water. <br>  The flow rate in the wetting system (water/glass tube system) was higher than that of the non-wetting system (water/Teflon tube one) due to the external pressure caused by interfacial energy, namely the contact angles and surface tension. These results indicate that the influence of the work of adhesion is considerably weaker than that of external pressure.

    DOI CiNii

  • アズテラン鋳物研究所

    鋳造工学   79 ( 6 ) 355 - 361  2007年

  • 鋳造欠陥とその対策

    日本鋳造工学会    2007年

  • 濡れから物づくりを考える

    素形材   48   59 - 60  2007年

  • 不純物元素除去の考え方

    中江 秀雄

    鋳造工学   79 ( 8 ) 451 - 458  2007年

    DOI CiNii

  • 35mass%Niを含有した鋳鉄の熱膨張係数に及ぼす炭素及びニッケル偏析の影響

    石川治, 橋本英紀, 中江秀雄

    鋳造工学   79 ( 10 ) 587 - 591  2007年

    DOI CiNii

  • 球状黒鉛鋳鉄の発明から今日まで

    鄭 想勲, 中江 秀雄

    鋳造工学   79 ( 10 ) 605 - 615  2007年

    DOI CiNii

  • Effect of particle addition to liquid metal on fabrication of aluminum foam

    Kota Kadoi, Hideo Nakae

    HIGH TEMPERATURE MATERIALS AND PROCESSES   26 ( 4 ) 275 - 283  2007年

     概要を見る

    Aluminum foams are very attractive materials for automobile and aerospace applications, where the weight reduction and the improvement in safety devices as energy absorbing materials are requested. These advantages should be affected by the size of the foam cell, namely, the smaller the better. Therefore, we shall discuss how to make finer foams. The most popular fabrication process of aluminum foams is particle decomposition in the melt process using TiH2 powder addition. In this study, by using an aqueous solution as a visible model, dynamic changes in the shape of the meniscus and the force which acts on a particle were examined as a function of the contact angle during the transfer process. We propose a model which can estimate the force necessary to entrap the particle in the liquid. Furthermore, the optimum stirring conditions for entrapping the particle and for uniformly dispersing it in the liquid were also investigated using the visible model. During the fabrication of the aluminum foams, as the starting materials, pure aluminum and Al-12.6Si alloys were used. The viscosity of these alloys increased to the objective value by the addition of Ca and aluminum powder, then TiH2 powder was added to the melts using the pre-optimized stirring conditions. It was found that the number of cells per unit area and the cell wall thickness were determined by the viscosity of the molten alloys.

  • 溶融金属への粒子添加・分散に対する撹拌条件の効果

    門井浩太, 中江秀雄

    鋳造工学   79 ( 11 ) 665 - 670  2007年

    DOI CiNii

  • 鋳鉄の凝固

    中江 秀雄

    鋳造工学   79 ( 11 ) 682 - 689  2007年

    DOI CiNii

  • 自発的溶浸法によるMMCの製造技術

    鋳造工学   79 ( 11 ) 699 - 704  2007年

  • 中国恐るべし

    素形材   48   41 - 44  2007年

  • Growth of multi-elements complex coating on AZ91D magnesium alloy through conversion treatment

    Ming Zhao, Shusen Wu, Ping An, Y. Fukuda, H. Nakae

    JOURNAL OF ALLOYS AND COMPOUNDS   427 ( 1-2 ) 310 - 315  2007年01月

     概要を見る

    The growth process of a new chromium-free multi-elements complex coating (MECC) on AZ91D magnesium alloy has been studied. The morphology and phase composition of the coatings have been determined with SEM, EDX, XRD and AFM. In addition, the thickness change of MECC layer and weight change of the specimen have been measured. On the basis of these experimental results, the coating formation is divided into initial stage, metaphase stage and late stage. At the initial stage, the compact coating is an amorphous material composed of O, Mg, Al and P. Meanwhile, coating growth is fast and mass-gain in unit area is negative owing to severe corrosion. At the metaphase stage, the coating layer consists of amorphous material of O, Mg, Al, P, Mn, and crystalline Mn5.65P3, (Mg0.66Al0.34) (Al0.83Mg0.17)(2)O-4, and the mass-gain in unit area decreases and coating quality degenerates. At the late stage, with the quantity increase of crystalline Mn5.65P3, (Mg0.66Al0.34) (Al0.83Mg0.17)(2)O-4, the coating surface becomes smooth and compact, and the coating grows into steady condition. (c) 2006 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Effect of particle addition to liquid metal on fabrication of aluminum foam

    Kota Kadoi, Hideo Nakae

    High Temperature Materials and Processes   26 ( 4 ) 275 - 283  2007年

     概要を見る

    Aluminum foams are very attractive materials for automobile and aerospace applications, where the weight reduction and the improvement in safety devices as energy absorbing materials are requested. These advantages should be affected by the size of the foam cell, namely, the smaller the better. Therefore, we shall discuss how to make finer foams. The most popular fabrication process of aluminum foams is particle decomposition in the melt process using TiH 2 powder addition. In this study, by using an aqueous solution as a visible model, dynamic changes in the shape of the meniscus and the force which acts on a particle were examined as a function of the contact angle during the transfer process. We propose a model which can estimate the force necessary to entrap the particle in the liquid. Furthermore, the optimum stirring conditions for entrapping the particle and for uniformly dispersing it in the liquid were also investigated using the visible model. During the fabrication of the aluminum foams, as the starting materials, pure aluminum and Al-12.6Si alloys were used. The viscosity of these alloys increased to the objective value by the addition of Ca and aluminum powder, then TiH2 powder was added to the melts using the pre-optimized stirring conditions. It was found that the number of cells per unit area and the cell wall thickness were determined by the viscosity of the molten alloys.

    DOI

  • A chromium-free conversion coating of magnesium alloy by a phosphate-permanganate solution

    M Zhao, SS Wu, Luo, JR, Y Fukuda, H Nakae

    SURFACE & COATINGS TECHNOLOGY   200 ( 18-19 ) 5407 - 5412  2006年05月

     概要を見る

    A chromium-free conversion coating for AZ91D magnesium alloy has been obtained by using a phosphate-penrianganate solution, which has been developed out without acid pickling. Examinations have been carried out on the conversion coatings for morphology, composition, adhesion force, and corrosion resistance. Results show that the conversion coatings are relatively uniform and continuous, with thickness from 7 mu m to 10 mu m. They demonstrate good adhesion to matrix and have some non-penetrating tiny holes on the surface. The main elements of the conversion coating of AZ91D alloy are Mg, O, P, K, Al and Mn by EPMA analysis. Results of corrosion resistance test indicate that the corrosion resistance of the conversion coating by phosphate-permanganate solution is matched to that of the conversion coating by traditional chromate solution, but for the corrosion resistance after painting, the former is better than the later. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • A chromium-free conversion coating of magnesium alloy by a phosphate-permanganate solution

    M Zhao, SS Wu, Luo, JR, Y Fukuda, H Nakae

    SURFACE & COATINGS TECHNOLOGY   200 ( 18-19 ) 5407 - 5412  2006年05月

     概要を見る

    A chromium-free conversion coating for AZ91D magnesium alloy has been obtained by using a phosphate-penrianganate solution, which has been developed out without acid pickling. Examinations have been carried out on the conversion coatings for morphology, composition, adhesion force, and corrosion resistance. Results show that the conversion coatings are relatively uniform and continuous, with thickness from 7 mu m to 10 mu m. They demonstrate good adhesion to matrix and have some non-penetrating tiny holes on the surface. The main elements of the conversion coating of AZ91D alloy are Mg, O, P, K, Al and Mn by EPMA analysis. Results of corrosion resistance test indicate that the corrosion resistance of the conversion coating by phosphate-permanganate solution is matched to that of the conversion coating by traditional chromate solution, but for the corrosion resistance after painting, the former is better than the later. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Fe-C合金の黒鉛形態に及ぼす硫黄と酸素の影響

    鄭 想勲, 井上 博文, 吉田 誠, 中江 秀雄

    鋳造工学   78 ( 4 ) 175 - 180  2006年

     概要を見る

    The present research was conducted to verify the effects of sulfur and oxygen on graphite morphologies using a Fe-C-120 massppm S mother alloy. In order to control the sulfur content in melt, three kinds of crucibles, namely, alumina, calcia, and calcia crucible with CaO-CaF2 powders were used. To control oxygen partial pressure, air, argon, and Ar-3%H2 atmosphere were employed. <br>  After melting in the alumina crucible, only flake graphite was formed in the specimen containing 78~98 massppm S. In the case of calcia crucible, aggregated and chunky graphite were observed in the specimen containing 11~20 massppm S. The specimen melted in a calcia crucible with CaO-CaF2 powders, showed spheroidal graphite with chunky graphite whose sulfur content was 1 to 11 massppm. <br>  We confirmed that the spheroidal graphite is formed due to the low activity of sulfur and oxygen below critical levels. The critical levels changed with the cooling rate of samples. In addition, the cooling curve of the specimen melted in calcia crucible with CaO-CaF2 powders did not show constant eutectic temperature, which is generally observed in that of flake graphite cast iron. This result is attributed to the solidification mode of spheroidal graphite, which differs from that of the flake graphite cast iron.

    DOI CiNii

  • Microstructure and corrosion resistance of a chromium-free multi-elements complex coating on AZ910 magnesium alloy

    ZHAO Ming, WU Shusen, AN Ping, LUO Jirong, FUKUDA Y, NAKAE H

    Materials Chemistry and Physics   99 ( 1 ) 54 - 60  2006年

    DOI CiNii

  • Spontaneous Infiltration Mechanism of AI-Si Melt into SiCp Preform

    Proc.of world Foundry Congress   111   1 - 9  2006年

  • Influence of viscosity-increasing processes on metal foam stability

    Proc.of world Foundry Congress   127   1 - 9  2006年

  • 中国の鋳造業の現状と将来

    〓 〓森, 中江 秀雄

    鋳造工学   78 ( 7 ) 367 - 370  2006年

    DOI CiNii

  • 鋳鉄の基地組織に及ぼす硫黄の影響

    中江秀雄, 杉田一久, ZHAO Bai‐Rong

    鋳造工学   78 ( 9 ) 457 - 463  2006年

     概要を見る

    The influence of sulfur content on the matrix structure of cast iron was studied using spheroidal graphite and flake graphite cast iron samples whose chemical composition was 3.6mass%C and 2.0mass%Si. The sulfur content of the flake graphite cast iron samples was changed from 0.006mass% to 0.076mass% with FeS addition. The matrix structure was observed for the as cast and heat treated samples. The heat treatments were annealing (furnace cooled) and normalizing (air cooled), cooled from the different heating temperature, as 850°C, 950°C and 1050°C. <br>  The formation of pearlite structure was accelerated with sulfur in flake graphite cast iron samples. The formation of pearlite in spheroidal graphite cast iron was nearly identical with that of the low sulfur flake samples. When the heating temperature was 850°C, the pearlite morphology was granular and the pearlite formed from the higher temperature and the as cast sample, the morphology was lamellar. The difference should be affected by the solubility of carbon in austenite.

    DOI CiNii

  • Eutectic Solidification Mode of Spheroidal Graphite Cast Iron and Graphitization

    Proceedings of Eighth International Symposium on Science and Proceeding of Cast Iron     98 - 114  2006年

  • Microstructure and corrosion resistance of a chromium-free multi-elements complex coating on AZ910 magnesium alloy

    Materials Chemistry and Physics   99 ( 1 ) 54 - 60  2006年

    DOI CiNii

  • Spontaneous Infiltration Mechanism of AI-Si Melt into SiCp Preform

    Proc.of world Foundry Congress   111   1 - 9  2006年

  • Influence of viscosity-increasing processes on metal foam stability

    Proc.of world Foundry Congress   127   1 - 9  2006年

  • Eutectic Solidification Mode of Spheroidal Graphite Cast Iron and Graphitization

    Proceedings of Eighth International Symposium on Science and Proceeding of Cast Iron     98 - 114  2006年

  • Effects of sulfur on interfacial energy between Fe-C melt and graphite

    S Jung, T Ishikawa, S Sekizuka, H Nakae

    JOURNAL OF MATERIALS SCIENCE   40 ( 9-10 ) 2227 - 2231  2005年05月

     概要を見る

    We used an improved sessile drop method, which can measure the equilibrium contact angle of molten Fe-C-S alloys on graphite basal planes using an equilibrated method. We adopted this method for the measurement of the interfacial energy, gamma(s/l), between the basal plane of graphite and the Fe-C melts at 1573 K in a purified He-3%H-2 atmosphere. For the calculation of gamma(s/l), we have to use the true graphite surface energy, gamma(s/v) and the surface tension of the iron melt, gamma(l/v), as the reference. However, we could not get a reliable gamma(s/l) value from the literature, because the gamma(s/v), value could be changed by the contamination of the vapor from the melt. For this reason, we measured the gamma(s/v) value using a nonequilibrated method based on the interfacial energy balance at the trijunction using gamma(l/v) and the contact angle theta and phi, where theta is the contact angle between the liquid metal and graphite substrate observed during the measurement by an optical microscope, and phi is the hidden angle observed at cross section of the sample.
    We found that the gamma(s/v), and gamma(s/l) values decrease when the sulfur contents are greater than 10 mass ppm sulfur. From 10 to 120 ppm sulfur, the decreasing rate has a constant value on a logarithmic scale of sulfur activities. The morphology of the graphite changes from spheroidal to flake as gamma(s/l) decreases due to increase in the sulfur content. (C) 2005 Springer Science + Business Media, Inc.

    DOI

  • Effects of roughness pitch of surfaces on their wettability

    H Nakae, M Yoshida, M Yokota

    JOURNAL OF MATERIALS SCIENCE   40 ( 9-10 ) 2287 - 2293  2005年05月

     概要を見る

    The surface roughness factors, such as the Wenzel roughness factor and so on, are very interrelated to each other. Therefore, it makes a precise discussion difficult on how the surface roughness affects the wettability. We already reported the effect of the surface roughness on the wettability at a constant Wenzel roughness factor using two kinds of models, the hemisphere close packing model and the hemiround rod close lining model. Nevertheless, the pitch is proportional to the height in these models. Therefore, we could not independently discuss the influence of roughness height and roughness pitch on the wettability.
    We developed our new models which can independently describe the influence of the surface roughness height and the roughness pitch on the wettability. We simulated loose packing sphere models by periodically placing small ball bearings and the loose lining round rod models by winding fine wires. The wettability was measured by the sessile drop method for the non-wetting system using paraffin coated samples and aqueous solutions. These results show that there is a critical pitch which determines the maximum contact angle in both systems. These results can be explained by the ratio of the solid/liquid/vapor and liquid/vapor line length at the three phase line. (C) 2005 Springer Science + Business Media, Inc.

    DOI

  • Effects of sulfur on interfacial energy between Fe-C melt and graphite

    S Jung, T Ishikawa, S Sekizuka, H Nakae

    JOURNAL OF MATERIALS SCIENCE   40 ( 9-10 ) 2227 - 2231  2005年05月

     概要を見る

    We used an improved sessile drop method, which can measure the equilibrium contact angle of molten Fe-C-S alloys on graphite basal planes using an equilibrated method. We adopted this method for the measurement of the interfacial energy, gamma(s/l), between the basal plane of graphite and the Fe-C melts at 1573 K in a purified He-3%H-2 atmosphere. For the calculation of gamma(s/l), we have to use the true graphite surface energy, gamma(s/v) and the surface tension of the iron melt, gamma(l/v), as the reference. However, we could not get a reliable gamma(s/l) value from the literature, because the gamma(s/v), value could be changed by the contamination of the vapor from the melt. For this reason, we measured the gamma(s/v) value using a nonequilibrated method based on the interfacial energy balance at the trijunction using gamma(l/v) and the contact angle theta and phi, where theta is the contact angle between the liquid metal and graphite substrate observed during the measurement by an optical microscope, and phi is the hidden angle observed at cross section of the sample.
    We found that the gamma(s/v), and gamma(s/l) values decrease when the sulfur contents are greater than 10 mass ppm sulfur. From 10 to 120 ppm sulfur, the decreasing rate has a constant value on a logarithmic scale of sulfur activities. The morphology of the graphite changes from spheroidal to flake as gamma(s/l) decreases due to increase in the sulfur content. (C) 2005 Springer Science + Business Media, Inc.

    DOI

  • Effects of roughness pitch of surfaces on their wettability

    H Nakae, M Yoshida, M Yokota

    JOURNAL OF MATERIALS SCIENCE   40 ( 9-10 ) 2287 - 2293  2005年05月

     概要を見る

    The surface roughness factors, such as the Wenzel roughness factor and so on, are very interrelated to each other. Therefore, it makes a precise discussion difficult on how the surface roughness affects the wettability. We already reported the effect of the surface roughness on the wettability at a constant Wenzel roughness factor using two kinds of models, the hemisphere close packing model and the hemiround rod close lining model. Nevertheless, the pitch is proportional to the height in these models. Therefore, we could not independently discuss the influence of roughness height and roughness pitch on the wettability.
    We developed our new models which can independently describe the influence of the surface roughness height and the roughness pitch on the wettability. We simulated loose packing sphere models by periodically placing small ball bearings and the loose lining round rod models by winding fine wires. The wettability was measured by the sessile drop method for the non-wetting system using paraffin coated samples and aqueous solutions. These results show that there is a critical pitch which determines the maximum contact angle in both systems. These results can be explained by the ratio of the solid/liquid/vapor and liquid/vapor line length at the three phase line. (C) 2005 Springer Science + Business Media, Inc.

    DOI

  • 鋳鉄の破面と黒鉛組織

    鋳造工学   77 ( 1 ) 51 - 57  2005年

  • 鋳鉄のひけに及ぼす凝固形態の影響

    中江 秀雄, 辛 昊〓

    鋳造工学   77 ( 2 ) 107 - 113  2005年

    DOI CiNii

  • 発泡金属(超軽量多孔質金属)

    塑性と加工   46 ( 529 ) 10 - 14  2005年

  • 素形材技術

    財素形材センター     11 - 50  2005年

  • 鋳造技術の進歩

    塑性加工学会   第36回  2005年

  • セラミックシェル鋳型の成分及び燃成温度と抗折強度の関係

    鋳造工学   77 ( 10 ) 689 - 695  2005年

    DOI

  • Formation Mechanism of Spheroidal Graphite and the Transfer to Chunky Graphite

    Proceeding of the 9th Asian Foundry Congress -Hanoi,Vietnam    2005年

  • Influences of Cooling Rate and Sulfur on the Formation of Spheroidal Graphite

    Proceeding of the 9th Asian Foundry Congress -Hanoi,Vietnam     242 - 249  2005年

  • Processing Fundametals of Fine Aluminum Foam Production from Liquid Metals

    Proc.Met Foamm   4   87 - 94  2005年

  • Influence of Viscosity on Foamability of Aluminum Melts

    Proc.Met Foamm   4   267 - 272  2005年

  • Formation Mechanism of Spheroidal Graphite and the Transfer to Chunky Graphite

    Proceeding of the 9th Asian Foundry Congress -Hanoi,Vietnam    2005年

  • Influences of Cooling Rate and Sulfur on the Formation of Spheroidal Graphite

    Proceeding of the 9th Asian Foundry Congress -Hanoi,Vietnam     242 - 249  2005年

  • Processing Fundametals of Fine Aluminum Foam Production from Liquid Metals

    Proc.Met Foamm   4   87 - 94  2005年

  • Influence of Viscosity on Foamability of Aluminum Melts

    Proc.Met Foamm   4   267 - 272  2005年

  • チャンキー黒鉛の生成機構とその防止策

    中江 秀雄

    鋳造工学   76 ( 2 ) 107 - 113  2004年

    DOI CiNii

  • 自発的溶浸法によるSiC粒子分散鋳鉄複合材料の製造

    中江 秀雄, 顧 紅星, 呉 樹森

    鋳造工学   76 ( 4 ) 296 - 302  2004年

     概要を見る

    &nbsp;&nbsp;To produce partially composed metal matrix composites, namely discontinuous MMCs, a spontaneous infiltration process was examined. The preforms of the interpenetrated composites with SiC particles were infiltrated without pressure using cast iron melt. The preforms were fabricated using furan resin and waterglass as the binder containing CuO, Cu2O and Fe2O3 powder for improving their wettability between the melt and SiC preform. As the infiltration process is controlled by a wetting phenomenon, how to improve this infiltration technique based on reactive wetting was investigated.<br>&nbsp;&nbsp;The preforms were sintered in a Tamman tube at 1173 K before infiltration. Cast iron sample weighing 40 g was placed on the preform and then infiltrated in air at 1673 K for two hours. The furan resin combined with CuO and Cu2O resulted in complete infiltration without pressure in air at 1673 K. The waterglass combined one was found to be inferior to that of the furan.

    DOI CiNii

  • 過共晶片状黒鉛鋳鉄の減衰特性に及ぼす黒鉛形状とマトリックスの影響

    趙 柏榮, 上野 勝司, 阿部 隆之, 中江 秀雄

    鋳造工学   76 ( 4 ) 303 - 308  2004年

     概要を見る

    &nbsp;&nbsp;Flake graphite cast iron is a high damping metal. Cast iron is used for engine block and brake materials in the automobile industry due to its low cost and high abrasive characteristics. High drivability characteristics of automobiles such as silence and effective braking ability are becoming more and more important recently. Since the anti-brake squeal materials are therefore needed for the brake materials, we studied the influence of graphite morphology and matrix on the damping capacity of hypereutectic cast iron.<br>&nbsp;&nbsp;The results charified that the damping capacity of the cast iron has good correlation with the graphite shape factor Ko, length of periphery of a graphite divided by the square root of the area, and kind of matrix. The damping capacity increases with the Ko value. This means that longer and thinner graphite promotes high damping capacity. Moreover, if the matrix consists of small amounts of martensite and bainite, up to 10%, with pearlite, the damping capacity increases with the fraction of the martensite and bainite.

    DOI CiNii

  • 鋳造技術は何処まで進んだか?-その歴史的経緯と最近の製品技術-

    素形材     21 - 26  2004年

  • The SEMI-FULL Mold Process Steel Casting

    The 66th World Foundry Congress     359 - 370  2004年

  • Infuence of Cooling rate on Graphite Morphology in Fe-C-F Alloys.

    The 66th World Foundry Congress     917 - 928  2004年

  • SiC粒子分散鋳鉄基複合材料の自発的溶浸速度

    顧 紅星, 中江 秀雄

    鋳造工学   76 ( 11 ) 909 - 914  2004年

    DOI CiNii

  • The SEMI-FULL Mold Process Steel Casting

    The 66th World Foundry Congress     359 - 370  2004年

  • Infuence of Cooling rate on Graphite Morphology in Fe-C-F Alloys.

    The 66th World Foundry Congress     917 - 928  2004年

  • The effects of viscosity and cooling conditions on the foamability of aluminum alloy

    C. C. Yang, H. Nakae

    Journal of Materials Processing Technology   141 ( 2 ) 202 - 206  2003年10月

     概要を見る

    The effect of viscosity and cooling conditions on the foamability of the molten Al-Si-Mg alloy was investigated using the unidirectional solidification method. The mechanism of pore formation in the Al-Si-Mg alloy has been observed and analyzed theoretically. The results obtained are given as follows: 1. The optimum torque of the melt for foaming is approximately 0.29Nm and is about 1.7 times that of the original melt. 2. The existence of alumina particles in the melt is necessary for nucleation of the bubbles and the increase in viscosity. 3. With the increase in the solidification time, the time for bubble growth increases during the unidirectional solidification. 4. The pore size and the total volume of the porosity increase with the diffusion of hydrogen and is controlled by the local solidification time during cooling of the hydrogen saturated melt. 5. Properly controlled viscosity and solidification of the melt are good for promoting uniformity of the pore structure of the aluminum foams. © 2002 Published by Elsevier Science B.V.

    DOI

  • The effects of viscosity and cooling conditions on the foamability of aluminum alloy

    CC Yang, H Nakae

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   141 ( 2 ) 202 - 206  2003年10月

     概要を見る

    The effect of viscosity and cooling conditions on the foamability of the molten Al-Si-Mg alloy was investigated using the unidirectional solidification method. The mechanism of pore formation in the Al-Si-Mg alloy has been observed and analyzed theoretically. The results obtained are given as follows:
    1. The optimum torque of the melt for foaming is approximately 0.29 N m and is about 1.7 times that of the original melt.
    2. The existence of alumina particles in the melt is necessary for nucleation of the bubbles and the increase in viscosity.
    3. With the increase in the solidification time, the time for bubble growth increases during the unidirectional solidification.
    4. The pore size and the total volume of the porosity increase with the diffusion of hydrogen and is controlled by the local solidification time during cooling of the hydrogen saturated melt.
    5. Properly controlled viscosity and solidification of the melt are good for promoting uniformity of the pore structure of the aluminum foams. (C) 2002 Published by Elsevier Science B.V.

    DOI

  • The effects of viscosity and cooling conditions on the foamability of aluminum alloy

    CC Yang, H Nakae

    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   141 ( 2 ) 202 - 206  2003年10月

     概要を見る

    The effect of viscosity and cooling conditions on the foamability of the molten Al-Si-Mg alloy was investigated using the unidirectional solidification method. The mechanism of pore formation in the Al-Si-Mg alloy has been observed and analyzed theoretically. The results obtained are given as follows:
    1. The optimum torque of the melt for foaming is approximately 0.29 N m and is about 1.7 times that of the original melt.
    2. The existence of alumina particles in the melt is necessary for nucleation of the bubbles and the increase in viscosity.
    3. With the increase in the solidification time, the time for bubble growth increases during the unidirectional solidification.
    4. The pore size and the total volume of the porosity increase with the diffusion of hydrogen and is controlled by the local solidification time during cooling of the hydrogen saturated melt.
    5. Properly controlled viscosity and solidification of the melt are good for promoting uniformity of the pore structure of the aluminum foams. (C) 2002 Published by Elsevier Science B.V.

    DOI

  • Theoretical Models and Proof of Particle Transfer into Molten Metal.

    中江 秀雄, 藤井 英俊, 趙 柏栄, 篠原 徹

    Nucleation and Growth   75 ( 8 ) 545 - 551  2003年

     概要を見る

    &nbsp;&nbsp;The effects of wetting on the transfer of a particle into molten metal were investigated using three theoretical models. The effects of particle diameter and contact angle between the particle and molten metal on the force for particle transfer were also calculated. Using these theoretical models, for any arbitrary value of the three interfacial energies (solid/vapor, solid/liquid and liquid/vapor), contact angle, particle radius, ratio of dipped length, particle and liquid density, the actual force required for the particle transfer can be obtained. Furthermore, these equations were verified using water solutions and paraffin coated steel balls with a 1mm radius in experiments where the contact angle was varied from 0&deg; to 105&deg; by changing the concentration of the surfactant (sodium lauryl sulfate). The surface tension of these aquasolutions were measured by the maximum bubble pressure method.

    DOI CiNii

  • Reducing Porosity at a T-junction Area of a Permanent Mould Aluminum Casting Aided by Computer Simulation.

    Proceeding of the Eighth Asian Foundry Congress     615 - 628  2003年

  • Oxidation of Molten Aluminum Alloy for Did Casting.

    Proceeding of the Eighth Asian Foundry Congress     241 - 248  2003年

  • New Semi-full Mold Process for stainless Steel Castings.

    Proceeding of the Eighth Asian Foundry Congress     503 - 510  2003年

  • Interfacial energy and structure in Al-Si alloys.

    Series in Materials Science and Engineering     326 - 338  2003年

  • Influence of Sulfur and Oxygen on Graphite Morphology in Fe-C alloy.

    Proceeding of the Eighth Asian Foundry Congress     112 - 121  2003年

  • Influence of Si and cooling Rate on Chunky Graphite Formation.

    中江 秀雄, 辛 昊〓, 原 真奈美, 原田 洋平

    Nucleation and Growth   75 ( 5 ) 337 - 343  2003年

    DOI

  • Fabrication of MMCs by Spontaneous Infiltration of Al - Si melt into SiCp preform

    Proceeding of the Eighth Asian Foundry Congress     383 - 391  2003年

  • Fabrication of MMCs by Spontaneous Infilration of Al-Si melt into SiCp preform.

    中江秀雄, 山浦秀樹, 杉山雄大

    J・JFS   75 ( 1 ) 29 - 34  2003年

    DOI

  • 自発的溶浸法によるSiC粒子分散 Al-Si合金複合材料の製造

    中江秀雄, 山浦秀樹, 杉山雄大

    鋳造工学   75 ( 1 ) 29 - 34  2003年

    DOI CiNii

  • 地球の材料資源・環境問題と鋳造業

    素形材     8 - 15  2003年

  • Interfacial energy and structure in Al-Si alloys

    Series in Materials Science and Engineering     326 - 338  2003年

  • チャンキー黒鉛の生成に及ぼすけい素及び冷却速度の影響:Influence of Si and cooling Rate on Chunky Graphite Formation

    中江 秀雄, 辛 昊〓, 原 真奈美, 原田 洋平

    鋳造工学   75 ( 5 ) 337 - 343  2003年

    DOI CiNii

  • 金属溶湯への粒子添加モデルとその検証:Theoretical Models and Proof of Particle Transfer into Molten Metal

    中江 秀雄, 藤井 英俊, 趙 柏栄, 篠原 徹

    鋳造工学   75 ( 8 ) 545 - 551  2003年

     概要を見る

    &nbsp;&nbsp;The effects of wetting on the transfer of a particle into molten metal were investigated using three theoretical models. The effects of particle diameter and contact angle between the particle and molten metal on the force for particle transfer were also calculated. Using these theoretical models, for any arbitrary value of the three interfacial energies (solid/vapor, solid/liquid and liquid/vapor), contact angle, particle radius, ratio of dipped length, particle and liquid density, the actual force required for the particle transfer can be obtained. Furthermore, these equations were verified using water solutions and paraffin coated steel balls with a 1mm radius in experiments where the contact angle was varied from 0&deg; to 105&deg; by changing the concentration of the surfactant (sodium lauryl sulfate). The surface tension of these aquasolutions were measured by the maximum bubble pressure method.

    DOI CiNii

  • Reducing Porosity at a T-junction Area of a Permanent Mould Aluminum Casting Aided by Computer Simulation

    Proceeding of the Eighth Asian Foundry Congress     615 - 628  2003年

  • Oxidation of Molten Aluminum Alloy for Did Casting

    Proceeding of the Eighth Asian Foundry Congress     241 - 248  2003年

  • New Semi-full Mold Process for stainless Steel Castings

    Proceeding of the Eighth Asian Foundry Congress     503 - 510  2003年

  • Influence of Sulfur and Oxygen on Graphite Morphology in Fe-C alloy

    Proceeding of the Eighth Asian Foundry Congress     112 - 121  2003年

  • Fabrication of MMCs by Spontaneous Infiltration of Al - Si melt into SiCp Prefom

    Proceeding of the Eighth Asian Foundry Congress     383 - 391  2003年

  • 鋳物五千年の歴史と近代化

    旭テクニカルレビュー   4   3 - 5  2003年

  • Modification mechanism of hypereutectic AI-Si alloy with P-Na addition (Trans. Nonferrous Met.)

    Soc China   13 ( 6 ) 1285 - 1289  2003年

  • 金属溶湯への粒子添加モデルとその検証

    中江 秀雄, 藤井 英俊, 趙 柏栄, 篠原 徹

    鋳造工学 = Journal of Japan Foundry Engineering Society   75 ( 8 ) 545 - 551  2003年

     概要を見る

    &nbsp;&nbsp;The effects of wetting on the transfer of a particle into molten metal were investigated using three theoretical models. The effects of particle diameter and contact angle between the particle and molten metal on the force for particle transfer were also calculated. Using these theoretical models, for any arbitrary value of the three interfacial energies (solid/vapor, solid/liquid and liquid/vapor), contact angle, particle radius, ratio of dipped length, particle and liquid density, the actual force required for the particle transfer can be obtained. Furthermore, these equations were verified using water solutions and paraffin coated steel balls with a 1mm radius in experiments where the contact angle was varied from 0&deg; to 105&deg; by changing the concentration of the surfactant (sodium lauryl sulfate). The surface tension of these aquasolutions were measured by the maximum bubble pressure method.

    DOI CiNii

  • Reducing Porosity at a T-junction Area of a Permanent Mould Aluminum Casting Aided by Computer Simulation.

    Proceeding of the Eighth Asian Foundry Congress     615 - 628  2003年

  • Oxidation of Molten Aluminum Alloy for Did Casting.

    Proceeding of the Eighth Asian Foundry Congress     241 - 248  2003年

  • New Semi-full Mold Process for stainless Steel Castings.

    Proceeding of the Eighth Asian Foundry Congress     503 - 510  2003年

  • Interfacial energy and structure in Al-Si alloys.

    Series in Materials Science and Engineering     326 - 338  2003年

  • Influence of Sulfur and Oxygen on Graphite Morphology in Fe-C alloy.

    Proceeding of the Eighth Asian Foundry Congress     112 - 121  2003年

  • Influence of Si and cooling Rate on Chunky Graphite Formation.

    Hideo Nakae, Ho-Chul Shin, Manami Hara, Yohei Harada

    Nucleation and Growth   75 ( 5 ) 337 - 343  2003年

    DOI

  • Fabrication of MMCs by Spontaneous Infiltration of Al - Si melt into SiCp preform

    Proceeding of the Eighth Asian Foundry Congress     383 - 391  2003年

  • Fabrication of MMCs by Spontaneous Infilration of Al-Si melt into SiCp preform.

    J・JFS   75 ( 1 ) 29 - 34  2003年

    DOI

  • Interfacial energy and structure in Al-Si alloys

    Series in Materials Science and Engineering     326 - 338  2003年

  • The effect of viscosity and cooling conditions on the foamability of aluminum alloy

    Journal of Materials Processing Technology   141 ( 2 ) 202 - 206  2003年

    DOI

  • Reducing Porosity at a T-junction Area of a Permanent Mould Aluminum Casting Aided by Computer Simulation

    Proceeding of the Eighth Asian Foundry Congress     615 - 628  2003年

  • Oxidation of Molten Aluminum Alloy for Did Casting

    Proceeding of the Eighth Asian Foundry Congress     241 - 248  2003年

  • New Semi-full Mold Process for stainless Steel Castings

    Proceeding of the Eighth Asian Foundry Congress     503 - 510  2003年

  • Influence of Sulfur and Oxygen on Graphite Morphology in Fe-C alloy

    Proceeding of the Eighth Asian Foundry Congress     112 - 121  2003年

  • Fabrication of MMCs by Spontaneous Infiltration of Al - Si melt into SiCp Prefom

    Proceeding of the Eighth Asian Foundry Congress     383 - 391  2003年

  • Modification mechanism of hypereutectic AI-Si alloy with P-Na addition (Trans. Nonferrous Met.)

    Soc China   13 ( 6 ) 1285 - 1289  2003年

  • Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites

    SS Wu, Y You, P An, T Kanno, H Nakae

    JOURNAL OF MATERIALS SCIENCE   37 ( 9 ) 1855 - 1860  2002年05月

     概要を見る

    Thermal analysis is used to establish the relationship between solidification history and the microstructure of SiC particulate reinforced Al-Si alloy-matrix composites. The results show that cooling curves are influenced by the presence of SiC particles and by strontium modification. The eutectic growth temperature of SiCP/359 composites modified with Sr lies in the range of 840 to 843 K, i.e., about 5 to 7 K higher than that of Sr-modified unreinforced 359. For the same composite, the eutectic undercooling is higher with Sr modification than without. The eutectic solidification time of the composites is shorter than that of the unreinforced base alloy because of the presence of the ceramic particles. Strontium modification has the tendency to extend the eutectic solidification time. Microstructure analysis reveals that Sr modification has a refining effect on eutectic silicon for the composites, and SiC particles in the composite melt serve as the substrates for eutectic Si phase nucleation. (C) 2002 Kluwer Academic Publishers.

    DOI

  • Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites

    SS Wu, Y You, P An, T Kanno, H Nakae

    JOURNAL OF MATERIALS SCIENCE   37 ( 9 ) 1855 - 1860  2002年05月

     概要を見る

    Thermal analysis is used to establish the relationship between solidification history and the microstructure of SiC particulate reinforced Al-Si alloy-matrix composites. The results show that cooling curves are influenced by the presence of SiC particles and by strontium modification. The eutectic growth temperature of SiCP/359 composites modified with Sr lies in the range of 840 to 843 K, i.e., about 5 to 7 K higher than that of Sr-modified unreinforced 359. For the same composite, the eutectic undercooling is higher with Sr modification than without. The eutectic solidification time of the composites is shorter than that of the unreinforced base alloy because of the presence of the ceramic particles. Strontium modification has the tendency to extend the eutectic solidification time. Microstructure analysis reveals that Sr modification has a refining effect on eutectic silicon for the composites, and SiC particles in the composite melt serve as the substrates for eutectic Si phase nucleation. (C) 2002 Kluwer Academic Publishers.

    DOI CiNii

  • Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites

    SS Wu, Y You, P An, T Kanno, H Nakae

    JOURNAL OF MATERIALS SCIENCE   37 ( 9 ) 1855 - 1860  2002年05月

     概要を見る

    Thermal analysis is used to establish the relationship between solidification history and the microstructure of SiC particulate reinforced Al-Si alloy-matrix composites. The results show that cooling curves are influenced by the presence of SiC particles and by strontium modification. The eutectic growth temperature of SiCP/359 composites modified with Sr lies in the range of 840 to 843 K, i.e., about 5 to 7 K higher than that of Sr-modified unreinforced 359. For the same composite, the eutectic undercooling is higher with Sr modification than without. The eutectic solidification time of the composites is shorter than that of the unreinforced base alloy because of the presence of the ceramic particles. Strontium modification has the tendency to extend the eutectic solidification time. Microstructure analysis reveals that Sr modification has a refining effect on eutectic silicon for the composites, and SiC particles in the composite melt serve as the substrates for eutectic Si phase nucleation. (C) 2002 Kluwer Academic Publishers.

    DOI

  • Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites

    SS Wu, Y You, P An, T Kanno, H Nakae

    JOURNAL OF MATERIALS SCIENCE   37 ( 9 ) 1855 - 1860  2002年05月

     概要を見る

    Thermal analysis is used to establish the relationship between solidification history and the microstructure of SiC particulate reinforced Al-Si alloy-matrix composites. The results show that cooling curves are influenced by the presence of SiC particles and by strontium modification. The eutectic growth temperature of SiCP/359 composites modified with Sr lies in the range of 840 to 843 K, i.e., about 5 to 7 K higher than that of Sr-modified unreinforced 359. For the same composite, the eutectic undercooling is higher with Sr modification than without. The eutectic solidification time of the composites is shorter than that of the unreinforced base alloy because of the presence of the ceramic particles. Strontium modification has the tendency to extend the eutectic solidification time. Microstructure analysis reveals that Sr modification has a refining effect on eutectic silicon for the composites, and SiC particles in the composite melt serve as the substrates for eutectic Si phase nucleation. (C) 2002 Kluwer Academic Publishers.

    DOI CiNii

  • Effect of sulfur content in base melt on nodule count of spheroidal graphitecast iron.

    五十嵐芳夫, 中江秀雄

    鋳造工学   74 ( 1 ) 30 - 35  2002年

    DOI

  • Influence of Ti and Si on D-type graphite Formation

    Proceeding of SPCI 7    2002年

  • Influence of sulfur on heterogerous nucleus of spheroidal graphite

    NAKAE H, IGARASHI Y

    Materils Transaction   43 ( 11 ) 2826 - 2831  2002年

    DOI

  • Influence of graphite morphology on fractured surface roughness in flake graphite cast iron

    Proceeding of the 65th World Foardry Congress     33 - 43  2002年

  • Influence of graphite morphology on fractured surface in flake graphite cast iron measured by laser roughness meter.

    中江秀雄, SHIN H‐C, 松尾正一

    鋳造工学   74 ( 10 ) 644 - 649  2002年

     概要を見る

    &nbsp;&nbsp;The measurement method of macroscopic graphite morphology in flake graphite cast iron was studied using a laser roughness meter on the fractured surface. The fracture of flake graphite cast iron mainly goes through the graphite matrix interface and the inside of the graphite. Assuming that the fracture surface contains considerable information on the graphite morphology, we therefore measured the surface roughness using a laser roughness meter.<br>&nbsp;&nbsp;The experimental results show that the graphite morphology, the ratio of the A-type and D-type graphite areas in the macroscopic range, can be accurately estimated using the laser roughness patterns of the fractured surface in flake graphite cast iron.

    DOI CiNii

  • Cast processing for metal foams (ultra-light-weight prorous metals)

    塑性加工   74   782 - 788  2002年

  • 薄肉球状黒鉛鋳鉄の黒鉛粒数に及ぼす元湯S量の影響

    五十嵐 芳夫, 中江 秀雄

    鋳造工学   74 ( 1 ) 30 - 35  2002年

     概要を見る

    &nbsp;&nbsp;To study the effects of sulfur content on the nodule count of spheroidal graphite cast iron, the sulfur content of the base melt was varied from 0.0004 mass % to 0.1mass %. The melt was then treated by Mg-ferrosilicon using the sandwich process to produce spheroidal graphite cast iron. The post-inoculated melt with ferrosilicon was poured into the silica sand molds with 2 mm thickness cavities to make thin castings specimens. The graphite nodule count and chilled structures in the thin sections were studied. The relationship between the nodule count and chill area was clarified and consequently the optimum sulfur content to avoid chill structure was obtained.

    DOI CiNii

  • 縦型帯域溶融結晶成長装置の作製と共晶・偏晶合金の協調成長に及ぼす対流、晶出相間の密度差および凝固方向の影響

    吉田 誠, 光山 嘉一郎, 佐々木 元, 福永 秀春, 青井 一郎, 中江 秀雄

    まてりあ   41 ( 2 ) 107 - 113  2002年

    DOI CiNii

  • 球状黒鉛鋳鉄の凝固:黒鉛の生成と生長

    まてりあ   40(別) ( 3 ) 107 - 114  2002年

  • 球状黒鉛の凝固:黒鉛の生成と生長

    中江 秀雄, 五十嵐 芳夫

    鋳造工学   74 ( 3 ) 197 - 204  2002年

    DOI CiNii

  • 地球の材料資源・環境問題と鋳造業

    キュポラを考える会 会報   33   1 - 10  2002年

  • Influence of Ti and Si on D-type Graphite Formation

    Science and Processing of Cast Iron    2002年

  • レーザー変位計を用いた片状黒鉛鋳鉄の破面解析による黒鉛形態の判定

    中江 秀雄, 辛 昊〓, 松尾 正一

    鋳造工学   74 ( 10 ) 644 - 649  2002年

     概要を見る

    &nbsp;&nbsp;The measurement method of macroscopic graphite morphology in flake graphite cast iron was studied using a laser roughness meter on the fractured surface. The fracture of flake graphite cast iron mainly goes through the graphite matrix interface and the inside of the graphite. Assuming that the fracture surface contains considerable information on the graphite morphology, we therefore measured the surface roughness using a laser roughness meter.<br>&nbsp;&nbsp;The experimental results show that the graphite morphology, the ratio of the A-type and D-type graphite areas in the macroscopic range, can be accurately estimated using the laser roughness patterns of the fractured surface in flake graphite cast iron.

    DOI CiNii

  • Influence of Graphite Morphology on Fractured Surface Roughness in Flake Graphite Cast Iron

    Proceeding of the 65th World Foundry Congress     33 - 42  2002年

  • Influence of Sulfur on Heterogeneous Nucleus of Spheroidal

    NAKAE H, IGARASHI Y

    Materials Transaction   43 ( 11 ) 2826 - 2831  2002年

    DOI CiNii

  • 鋳造法による発泡金属(超軽量多孔質金属)の製造法

    中江 秀雄, 楊 錦成

    鋳造工学   74 ( 12 ) 782 - 788  2002年

    DOI CiNii

  • 薄肉球状黒鉛鋳鉄の黒鉛粒数に及ぼす元湯S量の影響

    五十嵐 芳夫, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   74 ( 1 ) 30 - 35  2002年

     概要を見る

    &nbsp;&nbsp;To study the effects of sulfur content on the nodule count of spheroidal graphite cast iron, the sulfur content of the base melt was varied from 0.0004 mass % to 0.1mass %. The melt was then treated by Mg-ferrosilicon using the sandwich process to produce spheroidal graphite cast iron. The post-inoculated melt with ferrosilicon was poured into the silica sand molds with 2 mm thickness cavities to make thin castings specimens. The graphite nodule count and chilled structures in the thin sections were studied. The relationship between the nodule count and chill area was clarified and consequently the optimum sulfur content to avoid chill structure was obtained.

    DOI CiNii

  • Influence of Ti and Si on D-type graphite Formation

    Proceeding of SPCI 7    2002年

  • Influence of sulfur on heterogerous nucleus of spheroidal graphite

    Materils Transaction   43 ( 11 ) 2826 - 2831  2002年

    DOI

  • Influence of graphite morphology on fractured surface roughness in flake graphite cast iron

    Proceeding of the 65th World Foardry Congress     33 - 43  2002年

  • レーザ変位計を用いた片状黒鉛鋳鉄の破面解析による黒鉛形態の判定

    中江 秀雄, 辛 昊〓, 松尾 正一

    鋳造工学 = Journal of Japan Foundry Engineering Society   74 ( 10 ) 644 - 649  2002年

     概要を見る

    &nbsp;&nbsp;The measurement method of macroscopic graphite morphology in flake graphite cast iron was studied using a laser roughness meter on the fractured surface. The fracture of flake graphite cast iron mainly goes through the graphite matrix interface and the inside of the graphite. Assuming that the fracture surface contains considerable information on the graphite morphology, we therefore measured the surface roughness using a laser roughness meter.<br>&nbsp;&nbsp;The experimental results show that the graphite morphology, the ratio of the A-type and D-type graphite areas in the macroscopic range, can be accurately estimated using the laser roughness patterns of the fractured surface in flake graphite cast iron.

    DOI CiNii

  • Cast processing for metal foams (ultra-light-weight prorous metals)

    塑性加工   74   782 - 788  2002年

  • Influence of Ti and Si on D-type Graphite Formation

    Science and Processing of Cast Iron    2002年

  • Influence of Graphite Morphology on Fractured Surface Roughness in Flake Graphite Cast Iron

    Proceeding of the 65th World Foundry Congress     33 - 42  2002年

  • Influence of Sulfur on Heterogeneous Nucleus of Spheroidal

    Materials Transaction   43 ( 11 ) 2826 - 2831  2002年

    DOI CiNii

  • Bubble-growth for wetting and nonwetting system in the maximum bubble pressure method

    H Nakae, T Fukui

    MATERIALS TRANSACTIONS   42 ( 11 ) 2422 - 2426  2001年11月

     概要を見る

    This paper describes a new measuring apparatus for the maximum bubble pressure method to confirm the pressure change pattern during bubble formation for wetting and nonwetting systems. Generally speaking, a sawtooth pressure pattern has been widely accepted by many researchers in the maximum bubble pressure method. Nevertheless, when the accumulated gas volume is very small, the pressure change pattern shows a chopping wave pattern as theoretically estimated for both systems. These phenomena were confirmed by the observation of the bubbles during the measurement in an aqueous system, and also confirmed by the identical pressure pattern in a mercury system.

    DOI CiNii

  • Effect of graphite morphology on tensile properties of flake graphite cast iron

    H Nakae, H Shin

    MATERIALS TRANSACTIONS   42 ( 7 ) 1428 - 1434  2001年07月

     概要を見る

    The mechanical properties of flake graphite cast iron were studied using normal cast and unidirectionally solidified (UDS) test pieces. Their chemical composition was eutectic, namely CE = 4.3%, differing only in sulfur content. To eliminate the influence of the discontinuity of graphite at the eutectic cell boundary we used UDS samples. Fully annealed tensile test pieces were used to exclude the influence of the matrix. The experimental results are as follows: The tensile strength and elongation of normal and unidirectionally solidified cast iron are increased by the sulfur addition as the graphite morphology is modified. The tensile strength is improved by UDS. One of the reasons must be based on the continuity of the matrix. Nevertheless, the tensile strength of the UDS samples is not as strong as that of spheroidal graphite cast iron because the fracture occurs at the graphite-terminated area in the aligned graphite samples.

    DOI CiNii

  • Effect of graphite morphology on tensile properties of flake graphite cast iron

    H Nakae, H Shin

    MATERIALS TRANSACTIONS   42 ( 7 ) 1428 - 1434  2001年07月

     概要を見る

    The mechanical properties of flake graphite cast iron were studied using normal cast and unidirectionally solidified (UDS) test pieces. Their chemical composition was eutectic, namely CE = 4.3%, differing only in sulfur content. To eliminate the influence of the discontinuity of graphite at the eutectic cell boundary we used UDS samples. Fully annealed tensile test pieces were used to exclude the influence of the matrix. The experimental results are as follows: The tensile strength and elongation of normal and unidirectionally solidified cast iron are increased by the sulfur addition as the graphite morphology is modified. The tensile strength is improved by UDS. One of the reasons must be based on the continuity of the matrix. Nevertheless, the tensile strength of the UDS samples is not as strong as that of spheroidal graphite cast iron because the fracture occurs at the graphite-terminated area in the aligned graphite samples.

    DOI CiNii

  • Influence of growth direction on the microstructure of unidirectionally solidified Cu-Pb monotectic alloy using zone-melt technique

    Aoi, I, Makoto, I, M Yoshida, H Fukunaga, H Nakae

    JOURNAL OF CRYSTAL GROWTH   222 ( 4 ) 806 - 815  2001年02月

     概要を見る

    The influence of growth direction on the monotectic structure of the Cu-Pb alloy is studied. In order to examine the influence under a ly environment, both the upward (opposite to the direction of gravity) and downward (the direction of gravity) unidirectional solidifications (UDS) are carried out. In the case of the upward UDS, a banded structure, which consists of Pb-rich and Cu-rich layers, is observed. The L-2 droplets pile up in front of the solid/liquid interface. On the other hand, in the downward UDS, the irregularly shaped L-2 phase uniformly disperses in the specimen and no banded structure is found. The gravity macrosegregation of the L-2 liquid is observed at the bottom of the molten alloy in the downward solidified specimen. This is caused by the difference in the density between the L-1 and L-2 phases. Furthermore, a mechanism for the formation of a banded structure is suggested. This mechanism suggests that the coalesced L-2 phase covers the solid/liquid interface by producing a Pb-rich layer that permits an increase in the undercooling of the L-1/L-2 interface compared to the monotectic temperature. As nucleation of the CL-Cu phase occurs on the Pb-rich layer, the coexisting three phases are then restored. The temperature at the growth front is also returned to the monotectic temperature. The repetition mentioned above will result in the banded structure found in the upward UDS. :(C) 2001 Elsevier Science B.V. All rights reserved.

    DOI CiNii

  • Influence of growth direction on the microstructure of unidirectionally solidified Cu-Pb monotectic alloy using zone-melt technique

    Aoi, I, Makoto, I, M Yoshida, H Fukunaga, H Nakae

    JOURNAL OF CRYSTAL GROWTH   222 ( 4 ) 806 - 815  2001年02月

     概要を見る

    The influence of growth direction on the monotectic structure of the Cu-Pb alloy is studied. In order to examine the influence under a ly environment, both the upward (opposite to the direction of gravity) and downward (the direction of gravity) unidirectional solidifications (UDS) are carried out. In the case of the upward UDS, a banded structure, which consists of Pb-rich and Cu-rich layers, is observed. The L-2 droplets pile up in front of the solid/liquid interface. On the other hand, in the downward UDS, the irregularly shaped L-2 phase uniformly disperses in the specimen and no banded structure is found. The gravity macrosegregation of the L-2 liquid is observed at the bottom of the molten alloy in the downward solidified specimen. This is caused by the difference in the density between the L-1 and L-2 phases. Furthermore, a mechanism for the formation of a banded structure is suggested. This mechanism suggests that the coalesced L-2 phase covers the solid/liquid interface by producing a Pb-rich layer that permits an increase in the undercooling of the L-1/L-2 interface compared to the monotectic temperature. As nucleation of the CL-Cu phase occurs on the Pb-rich layer, the coexisting three phases are then restored. The temperature at the growth front is also returned to the monotectic temperature. The repetition mentioned above will result in the banded structure found in the upward UDS. :(C) 2001 Elsevier Science B.V. All rights reserved.

    DOI CiNii

  • Zone-melted unidirectional solidification of particulate dispersed composites

    SS Wu, H Nakae, T Kanno, Y You

    JOURNAL OF MATERIALS SCIENCE   36 ( 1 ) 225 - 229  2001年01月

     概要を見る

    In order to solve the problem of particles settling and agglomeration in front of solidifying interface in unidirectional solidification (UDS) experiments, a zone-melted process has been utilized in this study. The experimental results show that, the melting zone could be kept in 30-40 mm width and the zone melted UDS experiments are realized with Al2O3 particle reinforced aluminum-matrix composites. But particle settling still occurs in the liquid, and becomes severe as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20-22 vol.%, no further settling occurs under a solidification rate of 8-16 mm/h. Investigation on the interaction of particles and solid/liquid interface reveals that the Al2O3 particles are rejected into liquid and pushed by the growing solid phase in Al2O3(P)/Al and Al2O3(P)/Al-0.23wt.%Ce composites. Some particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries. (C) 2001 Kluwer Academic Publishers.

    DOI CiNii

  • Thermal analysis of solidification behavior of SiC(P)/AL-SI composites

    Proceeding of ICCM 13    2001年

  • Technical review for cast iron melting and quality of castings.

    鋳造工学   73 ( 2 ) 128 - 133  2001年

  • Influence of gravity on the growth of unidirectionaly solidified eutectic alloys.

    Proceeding of PRICM4     2383 - 2386  2001年

  • Heterogeneous nucleus of spheroidal graphite and mechanism of spheroidal graphite formation.

    中江秀雄, 五十嵐芳夫, 小野幸徳

    鋳造工学   73 ( 2 ) 111 - 117  2001年

    DOI

  • Formation mechanism of chunky graphite.

    Proceedings of the international conference on the science of casting and solidification     336 - 343  2001年

  • Formation Machanism of shrinkage in spheroidal graphite iron casting

    Proceeding of the 7th Asian Foundry Congress     109 - 117  2001年

  • Fluidity of magnesium alloy in Thixo-mold die casting process

    Proceeding of the 7th Asian Foundry Congress    2001年

  • Equilibrium contact angles in the NilAl system

    Transactions of JWRI   30   27 - 32  2001年

  • Effects of S, Mn and RE on Eutectic Temperrature of cast iron

    菅野利猛, KANG I, 水木徹, 中江秀雄

    鋳造工学   73 ( 7 ) 441 - 446  2001年

    DOI

  • Bubble-Growth for wetting and nonwetting system in the maximum bubble process method

    Matarials Transaction   42 ( 11 ) 2422 - 2426  2001年

    DOI CiNii

  • 反応系における漏れ性の評価

    大阪大学接合科学研究所    2001年

  • 球状黒鉛生成のメカニズムと引け

    素形材技術センター    2001年

  • 一方向に凝固した共晶・偏晶系合金の凝固組織に及ぼす影響

    日本学術振興会   凝固プロセス研究会  2001年

  • 鋳鉄溶解技術と高度化技術の最近の動向

    中江 秀雄

    鋳造工学   73 ( 2 ) 128 - 133  2001年

    DOI CiNii

  • 球状黒鉛の不均質核物質と黒鉛の球状化機構

    中江秀雄, 五十嵐芳夫, 小野幸徳

    鋳造工学   73 ( 2 ) 111 - 117  2001年

    DOI CiNii

  • Influence of growth direction on the microstructure of unidirectionally solidified Cu-Pb monotectic alloy using zone-melt technique

    AOI I, ISHINO M, YOSHIDA M, FUKUNAGA H, NAKAE H

    ELSEVIER   222 ( 4 ) 806 - 815  2001年

    DOI CiNii

  • Zone-melted unidirectional solidification of particulate dispersed composites

    SS Wu, H Nakae, T Kanno, Y You

    JOURNAL OF MATERIALS SCIENCE   36 ( 1 ) 225 - 229  2001年01月

     概要を見る

    In order to solve the problem of particles settling and agglomeration in front of solidifying interface in unidirectional solidification (UDS) experiments, a zone-melted process has been utilized in this study. The experimental results show that, the melting zone could be kept in 30-40 mm width and the zone melted UDS experiments are realized with Al2O3 particle reinforced aluminum-matrix composites. But particle settling still occurs in the liquid, and becomes severe as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20-22 vol.%, no further settling occurs under a solidification rate of 8-16 mm/h. Investigation on the interaction of particles and solid/liquid interface reveals that the Al2O3 particles are rejected into liquid and pushed by the growing solid phase in Al2O3(P)/Al and Al2O3(P)/Al-0.23wt.%Ce composites. Some particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries. (C) 2001 Kluwer Academic Publishers.

    DOI

  • Formation mechanism of chunky graphite

    The science of casting and solidification May,2001     336 - 342  2001年

  • Thermal analysis of solidification behavior of SiC(p)/AL-SI composites

    ICCM 13(2001.6)     1 - 8  2001年

  • Influence of gravity on the growth of unidirectionally solidified eutectic alloys

    PRICM proc.(2001)     1 - 4  2001年

  • Equilibrium contact angles in the Ni/Al system

    Trans.JWRI,Vol.30(2001)     27 - 32  2001年

  • Formation mechanism of shrinkage in spheroidal graphite iron castings

    Proceedings of the 7th Asian foundry congress-Taiwan 2001     109 - 117  2001年

  • Fluidity of magnesium ally in Thixo-mold die casting process

    Proceedings of the 7th Asian foundry congress-Taiwan 2001     675 - 682  2001年

  • Zone-melted unidirectional solidification of particulate dispersed composites

    SS Wu, H Nakae, T Kanno, Y You

    JOURNAL OF MATERIALS SCIENCE   36 ( 1 ) 225 - 229  2001年01月

     概要を見る

    In order to solve the problem of particles settling and agglomeration in front of solidifying interface in unidirectional solidification (UDS) experiments, a zone-melted process has been utilized in this study. The experimental results show that, the melting zone could be kept in 30-40 mm width and the zone melted UDS experiments are realized with Al2O3 particle reinforced aluminum-matrix composites. But particle settling still occurs in the liquid, and becomes severe as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20-22 vol.%, no further settling occurs under a solidification rate of 8-16 mm/h. Investigation on the interaction of particles and solid/liquid interface reveals that the Al2O3 particles are rejected into liquid and pushed by the growing solid phase in Al2O3(P)/Al and Al2O3(P)/Al-0.23wt.%Ce composites. Some particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries. (C) 2001 Kluwer Academic Publishers.

    DOI CiNii

  • Thermal analysis of solidification behavior of SiC(P)/AL-SI composites

    Proceeding of ICCM 13    2001年

  • Technical review for cast iron melting and quality of castings.

    鋳造工学   73 ( 2 ) 128 - 133  2001年

  • Influence of gravity on the growth of unidirectionaly solidified eutectic alloys.

    Proceeding of PRICM4     2383 - 2386  2001年

  • Heterogeneous nucleus of spheroidal graphite and mechanism of spheroidal graphite formation.

    鋳造工学   73 ( 2 ) 111 - 117  2001年

    DOI

  • Formation mechanism of chunky graphite.

    Proceedings of the international conference on the science of casting and solidification     336 - 343  2001年

  • Formation Machanism of shrinkage in spheroidal graphite iron casting

    Proceeding of the 7th Asian Foundry Congress     109 - 117  2001年

  • Fluidity of magnesium alloy in Thixo-mold die casting process

    Proceeding of the 7th Asian Foundry Congress    2001年

  • Equilibrium contact angles in the NilAl system

    Transactions of JWRI   30   27 - 32  2001年

  • Effects of S, Mn and RE on Eutectic Temperrature of cast iron

    鋳造工学   73 ( 7 ) 441 - 446  2001年

    DOI

  • Effect of graphite morphology on tensile properties of flake graphite cast iron

    Matarials Transaction   42 ( 7 ) 1428 - 1434  2001年

    DOI CiNii

  • Bubble-Growth for wetting and nonwetting system in the maximum bubble process method

    Hideo Nakae, Tomoaki Fukui

    Matarials Transaction   42 ( 11 ) 2422 - 2426  2001年

    DOI CiNii

  • Influence of growth direction on the microstructure of unidirectionally solidified Cu-Pb monotectic alloy using zone-melt technique

    ELSEVIER   222 ( 4 ) 806 - 815  2001年

    DOI CiNii

  • Zone-melted unidirectional solidification of particulate dispersed composites

    SS Wu, H Nakae, T Kanno, Y You

    JOURNAL OF MATERIALS SCIENCE   36 ( 1 ) 225 - 229  2001年01月

     概要を見る

    In order to solve the problem of particles settling and agglomeration in front of solidifying interface in unidirectional solidification (UDS) experiments, a zone-melted process has been utilized in this study. The experimental results show that, the melting zone could be kept in 30-40 mm width and the zone melted UDS experiments are realized with Al2O3 particle reinforced aluminum-matrix composites. But particle settling still occurs in the liquid, and becomes severe as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20-22 vol.%, no further settling occurs under a solidification rate of 8-16 mm/h. Investigation on the interaction of particles and solid/liquid interface reveals that the Al2O3 particles are rejected into liquid and pushed by the growing solid phase in Al2O3(P)/Al and Al2O3(P)/Al-0.23wt.%Ce composites. Some particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries. (C) 2001 Kluwer Academic Publishers.

    DOI

  • Formation mechanism of chunky graphite

    The science of casting and solidification May,2001     336 - 342  2001年

  • Thermal analysis of solidification behavior of SiC(p)/AL-SI composites

    ICCM 13(2001.6)     1 - 8  2001年

  • Influence of gravity on the growth of unidirectionally solidified eutectic alloys

    PRICM proc.(2001)     1 - 4  2001年

  • Equilibrium contact angles in the Ni/Al system

    Trans.JWRI,Vol.30(2001)     27 - 32  2001年

  • Effect of graphite morphology on tensile properties of flake graphite cast iron

    H. Nakae, H. Shin

    Materials Transactions   42 ( 7 ) 1428 - 1434  2001年

     概要を見る

    The mechanical properties of flake graphite cast iron were studied using normal cast and unidirectionally solidified (UDS) test pieces. Their chemical composition was cutectic, namely CE = 4.3%, differing only in sulfur content. To eliminate the influence of the discontinuity of graphite at the cutectic cell boundary, we used UDS samples. Fully annealed tensile test pieces were used to exclude the influence of the matrix. The experimental results are as follows: The tensile strength and elongation of normal and unidirectionally solidified cast iron are increased by the sulfur addition as the graphite morphology is modified. The tensile strength is improved by UDS. One of the reasons must be based on the continuity of the matrix. Neverthless, the tensile strength of the UDS samples is not as strong as that of spheroidal graphite cast iron because the fracture occurs at the graphite-terminated area in the aligned graphite samples.

    DOI CiNii

  • Formation mechanism of shrinkage in spheroidal graphite iron castings

    Proceedings of the 7th Asian foundry congress-Taiwan 2001     109 - 117  2001年

  • Fluidity of magnesium ally in Thixo-mold die casting process

    Proceedings of the 7th Asian foundry congress-Taiwan 2001     675 - 682  2001年

  • Bubble-Growth for Wetting and Nonwetting System in the Maximum Bubble Pressure Method

    Nakae Hideo, Fukui Tomoaki

    Materials transactions   42 ( 11 ) 2422 - 2426  2001年

    DOI CiNii

  • Foaming characteristics control during production of aluminum alloy foam

    C. C. Yang, H. Nakae

    Journal of Alloys and Compounds   313 ( 1-2 ) 188 - 191  2000年12月

     概要を見る

    In recent years, there is a high demand for the development of light-weight metals foams. In this paper, the factors which affect the foaming in a foamed aluminum casting process were investigated. The powdered titanium hydride as a foaming agent was added to the molten aluminum alloy in the amount of 0.5 to 2.5% to adjust a proper amount of the foaming agent, and foaming condition was controlled in the temperature range, from 893 to 933 K, to determine the optimum foaming process to obtain a homogeneous aluminum foam. It was found that a properly controlled holding temperature and titanium hydride content of the melt were good for the acquirement of foamed aluminum which contains uniform cell structure of high porosity. The optimum foamed aluminum with air bubbles of 2 to 6 mm diameter and the uniform distribution with 86% porosity was obtained by the addition of 1.0% titanium hydride at 913 K.

    DOI

  • Foaming characteristics control during production of aluminum alloy foam

    C. C. Yang, H. Nakae

    Journal of Alloys and Compounds   313 ( 1-2 ) 188 - 191  2000年12月

     概要を見る

    In recent years, there is a high demand for the development of light-weight metals foams. In this paper, the factors which affect the foaming in a foamed aluminum casting process were investigated. The powdered titanium hydride as a foaming agent was added to the molten aluminum alloy in the amount of 0.5 to 2.5% to adjust a proper amount of the foaming agent, and foaming condition was controlled in the temperature range, from 893 to 933 K, to determine the optimum foaming process to obtain a homogeneous aluminum foam. It was found that a properly controlled holding temperature and titanium hydride content of the melt were good for the acquirement of foamed aluminum which contains uniform cell structure of high porosity. The optimum foamed aluminum with air bubbles of 2 to 6 mm diameter and the uniform distribution with 86% porosity was obtained by the addition of 1.0% titanium hydride at 913 K.

    DOI

  • Foaming characteristics control during production of aluminum alloy foam

    CC Yang, H Nakae

    JOURNAL OF ALLOYS AND COMPOUNDS   313 ( 1/2 ) 188 - 191  2000年12月

     概要を見る

    In recent years, there is a high demand for the development of light-weight metals foams. In this paper, the factors which affect the foaming in a foamed aluminum casting process were investigated. The powdered titanium hydride as a foaming agent was added to the molten aluminum alloy in the amount of 0.5 to 2.5% to adjust a proper amount of the foaming agent, and foaming condition was controlled in the temperature range, from 893 to 933 K, to determine the optimum foaming process to obtain a homogeneous aluminum foam. It was found that a properly controlled holding temperature and titanium hydride content of the melt were good for the acquirement of foamed aluminum which contains uniform cell structure of high porosity. The optimum foamed aluminum with air bubbles of 2 to 6 mm diameter and the uniform distribution with 86% porosity was obtained by the addition of 1.0% titanium hydride at 913 K. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI CiNii

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    64th World Foundry Cogress    2000年

  • Progress and strategy for future development of foundry technology in China.

    鋳造工学   72 ( 9 ) 621 - 625  2000年

  • Pressurless infiltration into preformed SiCp by Al-Si alloys

    H Nakae, H Yamaura, T Miyamoto, T Yanagihara

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     165 - 168  2000年

     概要を見る

    For the production of partially composed metal matrix composites, namely discontinuous MMCs, using a casting process, the interpenetrated phase composites with SiC particles were fabricated by pressureless infiltration using molten Al-Si alloys. This process is based on a wetting phenomenon, therefore, we discussed the technique based on the reactive wetting.
    The SiC particles coated by diluted water glass were sintered in a mullite Tammann tube and simultaneously infiltrated with molten Al-Si alloys in air at 1173 similar to 1573K. As for the improvement of the wettability between the SiC and the liquid aluminum alloy, Fe3O4 powder was mixed with the water glass due to the thermit reaction between Fe3O4 and molten aluminum alloy. In some experiments, pure aluminum powder was placed on the sintered SiCp to increase the interfacial area and the chemical reaction between the sintered SiCp and the melt. By combining these conditions, we succeeded in the complete infiltration without pressure at 1173K.

  • Prediction of Graphite Types and Mechanical Properties in Cast Iron Using Three Cups Thermal Analysis

    菅野 利猛, 中江 秀雄

    鋳造工学   72 ( 3 ) 175 - 180  2000年

    DOI

  • New process for the fabrication of cast aluminum alloy matrix composites

    T Kimura, H Yamaura, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     135 - 140  2000年

     概要を見る

    In 1968 J. N. Reding et al. suggested processes for fabricating composites. According to their patent, decompression atmosphere, which occurs during the reaction between magnesium and oxygen and/or nitrogen in the closed system, causes the spontaneous infiltration of melt into narrow spaces such as ceramic preforms. However, they did not report the proof of this phenomenon or the industrial manufacturing method. Therefore, this research measured the pressure change among SiC particles surrounding molten aluminum. As a result, the pressure reduction during the Mg reaction was identified. Moreover, the existence of Mg,N,, which improves the wettability between Al alloy melt and SiC particles on the interface, was observed on the surface of particles. Applying these two phenomena, a new process for the manufacturing of cast discontinuously reinforced aluminum composites (DRA) was developed. This new method is expected to produce DRA without additional pressure.

  • Influence of gravity on monotectic and eutectic growth

    Aoi, I, M Yoshida, M Ishino, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     1017 - 1022  2000年

     概要を見る

    The influence of gravity on the microstructure of unidirectionally solidified Cu-Pb monotectic, Ag-Si and Fe-C eutectic alloys is studied. In order to examine the influence of gravity in a Ig environment, both the upward (opposite to direction of gravity) and downward (direction of gravity) unidirectional solidifications are carried out. The results are as follows: (1) For the upward solidified Ag-Si eutectic alloy, the eutectic Si continuously grows. On the other hand, in the downward solidified Ag-Si alloy, the Si grows discontinuously and disperses into the a-Ag matrix. (2) No morphological difference in the eutectic growth is observed between the upward and downward solidified Fe-C eutectic alloys. (3) In the case of the upward solidified Cu-Pb monotectic alloy, a banded structure, which consists of Pb-rich layers and Cu-rich layers, is observed. However, such a banded structure is not observed in the downward specimen. (4) The banded structure is not found in the upward solidified Cu-Pb-0.05 mass%Al and Cu-Pb-0.1 mass%Al alloys. In the Cu-Pb-0.05 mass%Al alloy, a fibrous L-2 phase grows continuously parallel to the growth direction at low growth rate. Only 500 mass ppm addition of aluminum induces the morphological change of the monotectic L-2 phase.

  • Influence of Chemical Composition of Sands on Burn-on of Iron Castings

    中江秀雄, 松田泰明

    鋳造工学   72 ( 2 ) 102 - 106  2000年

    DOI

  • Gravitational Influence on the Microsfructure of Directionally Solidified Monofectic and Eutectic Alloys

    Materials Science Forum     329  2000年

  • Foaming mechanism in solidifying aluminum alloys.

    楊 錦成, 中江 秀雄

    鋳造工学   72 ( 9 ) 593 - 598  2000年

    DOI

  • Foam structure effect on the compression behavior of foamed aluminum alloy

    CC Yang, H Nakae

    ISIJ INTERNATIONAL   40 ( 12 ) 1283 - 1286  2000年

     概要を見る

    The effect of the foam structure on the compression behavior of an A-Si-Mg alloy foam, which was produced by a liquid metal method was experimentally investigated. The compressive stress-strain behavior is discussed due to the deformation of a cell within the foam. It is found that the foam with an 81.3 % porosity has both a higher energy absorption capacity and a higher efficiency. The compressive strength decrease as the porosity increases. Experimental result showed that the low compressive strength is attributed to cells imperfection due to the higher porosity.

    DOI CiNii

  • Effect of Mn and Ti on Matrix of High Purity Cast Iron

    辛 昊〓, 中江 秀雄

    鋳造工学   72 ( 4 ) 268 - 272  2000年

    DOI

  • Effect of graphite morphology on mechanical properties of cast iron.

    64th World Foundry Cogress    2000年

  • 鉄鋳物の焼付き性に対する砂の化学組織の影響

    中江秀雄, 松田泰明

    鋳造工学   72 ( 2 ) 102 - 106  2000年

     概要を見る

    &nbsp;&nbsp;The burn-on of iron castings, namely chemical penetration, has posed as one of the main casting defects for a long time. However, no solution has yet been clarified for this intricate phenomena. In this paper, we discuss how the burn-on is affected with the SiO2 content of sands from the standpoint of wettability using the sessile drop method. The apparent contact angle between the sand grains and melt decreases with the formation of FeO slag at the interface, and stop the advancing by the dissolution of SiO2into the slag due to the increase in the melting temperature. The reason why chemical penetration defects can be prevented by the addition of coal dust into mold, is not only due to the decrease the FeO slag formation but also due to the ease of saturation of the slag with SiO2 to increase the melting temperature.

    DOI CiNii

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Cu-Pb Monotectic Alloy

    Proceedings of MCSP4'99     331 - 339  2000年

  • Formation of Spheroidal Graphite in Fe-C and Ni-C Alloys

    Proceedings of MCSP4'99     57 - 65  2000年

  • 3カップ熱分析法による黒鉛形状と機械的性質の予測

    菅野 利猛, 中江 秀雄

    鋳造工学   72 ( 3 ) 175 - 180  2000年

    DOI CiNii

  • リサイクル産業としての鋳造業

    鋳物ダイジェスト     1 - 6  2000年

  • 片状黒鉛鑄鉄の定量化

    第136回日本鋳造工学会全国講演大会    2000年

  • リサイクル産業としての鋳造業

    日本鋳物工業界会    2000年

  • チャンキー黒鉛の生成機構

    第136回日本鋳造工学会全国講演大会    2000年

  • Wetting control of solid surface

    工研院工業材料研究所(台湾)    2000年

  • Foaming characteristics control during production of aluminum alloy foam

    YANG C C, NAKAE H

    ELSEVIER   313 ( 1/2 ) 188 - 191  2000年

    DOI

  • 中国の鋳物技術の進歩と今後の戦略

    鋳造工学     621 - 625  2000年

  • アルミニウム合金の凝固過程における発泡機構

    楊 錦成, 中江 秀雄

    鋳造工学   72 ( 9 ) 593 - 598  2000年

     概要を見る

    &nbsp;&nbsp;In recent years, there is a high demand for the development of light weight metals in industry. One of the materials is foamed aluminum alloys. In this research, we studied the foaming mechanism for the development of materials using a solidification process.<br>&nbsp;&nbsp;The viscosity in the melt was increased by the oxidation of the melt to form fine Al2O3 particles, and then 1 mass % titanium hydride powder was added to the melt and unidirectionally solidified to make the aluminum alloy foam. Hydrogen bubbles nucleated on the Al2O3 particles at the solid/liquid interface and entrapped in the solid. This shows that the Al2O3 particles not only affect the increase in viscosity but also serve as nucleating agents for the bubbles.

    DOI CiNii

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    65th World Foundry Cogress    2000年

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    64th World Foundry Cogress    2000年

  • Effect of graphite morphology on mechanical properties of cast iron.

    67th World Foundry Cogress    2000年

  • Effect of graphite morphology on mechanical properties of cast iron

    66th World Foundry Cogress    2000年

  • 片状黒鉛鑄鉄におけるS,Mn 及び REの働き

    日本鋳造工学会    2000年

  • 発泡金属・立体ハニカムと鋳造工学

    日本鋳造工学会    2000年

  • アルミニウム合金によるアルミニウム合金の鋳造接合と界面反応

    日本鋳造工学会    2000年

  • Fe-C-Si-V 合金における粒状炭化物の生成

    日本鋳造工学会    2000年

  • Al合金基SiC形成体複合材料の鋳造法による製造

    日本鋳造工学会    2000年

  • Al-Si 合金における初晶Siの微細化

    日本鋳造工学会    2000年

  • ヨーロッパの鋳物研究事業と世界鋳物国際会議

    素形材     18 - 21  2000年

  • Pressurless infiltration into preformed SiCp by Al-Si alloys

    H Nakae, H Yamaura, T Miyamoto, T Yanagihara

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     165 - 168  2000年

     概要を見る

    For the production of partially composed metal matrix composites, namely discontinuous MMCs, using a casting process, the interpenetrated phase composites with SiC particles were fabricated by pressureless infiltration using molten Al-Si alloys. This process is based on a wetting phenomenon, therefore, we discussed the technique based on the reactive wetting.
    The SiC particles coated by diluted water glass were sintered in a mullite Tammann tube and simultaneously infiltrated with molten Al-Si alloys in air at 1173 similar to 1573K. As for the improvement of the wettability between the SiC and the liquid aluminum alloy, Fe3O4 powder was mixed with the water glass due to the thermit reaction between Fe3O4 and molten aluminum alloy. In some experiments, pure aluminum powder was placed on the sintered SiCp to increase the interfacial area and the chemical reaction between the sintered SiCp and the melt. By combining these conditions, we succeeded in the complete infiltration without pressure at 1173K.

  • New process for the fabrication of cast aluminum alloy matrix composites.

    Second international conference on processing materials TMS     35 - 140  2000年

  • Influence of gravity on monotectic and eutectic growth

    Aoi, I, M Yoshida, M Ishino, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     1017 - 1022  2000年

     概要を見る

    The influence of gravity on the microstructure of unidirectionally solidified Cu-Pb monotectic, Ag-Si and Fe-C eutectic alloys is studied. In order to examine the influence of gravity in a Ig environment, both the upward (opposite to direction of gravity) and downward (direction of gravity) unidirectional solidifications are carried out. The results are as follows: (1) For the upward solidified Ag-Si eutectic alloy, the eutectic Si continuously grows. On the other hand, in the downward solidified Ag-Si alloy, the Si grows discontinuously and disperses into the a-Ag matrix. (2) No morphological difference in the eutectic growth is observed between the upward and downward solidified Fe-C eutectic alloys. (3) In the case of the upward solidified Cu-Pb monotectic alloy, a banded structure, which consists of Pb-rich layers and Cu-rich layers, is observed. However, such a banded structure is not observed in the downward specimen. (4) The banded structure is not found in the upward solidified Cu-Pb-0.05 mass%Al and Cu-Pb-0.1 mass%Al alloys. In the Cu-Pb-0.05 mass%Al alloy, a fibrous L-2 phase grows continuously parallel to the growth direction at low growth rate. Only 500 mass ppm addition of aluminum induces the morphological change of the monotectic L-2 phase.

  • Equilibrium contact angle for Ni/Al systems

    HTC-2000    2000年

  • Foam structure effect on the compression behavior of foamed aluminum alloy.

    ISIJ   40 ( 12 ) 1283 - 1286  2000年

    DOI

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    64th World Foundry Cogress    2000年

  • Progress and strategy for future development of foundry technology in China.

    鋳造工学   72 ( 9 ) 621 - 625  2000年

  • Pressurless infiltration into preformed SiCp by Al-Si alloys

    H Nakae, H Yamaura, T Miyamoto, T Yanagihara

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     165 - 168  2000年

     概要を見る

    For the production of partially composed metal matrix composites, namely discontinuous MMCs, using a casting process, the interpenetrated phase composites with SiC particles were fabricated by pressureless infiltration using molten Al-Si alloys. This process is based on a wetting phenomenon, therefore, we discussed the technique based on the reactive wetting.
    The SiC particles coated by diluted water glass were sintered in a mullite Tammann tube and simultaneously infiltrated with molten Al-Si alloys in air at 1173 similar to 1573K. As for the improvement of the wettability between the SiC and the liquid aluminum alloy, Fe3O4 powder was mixed with the water glass due to the thermit reaction between Fe3O4 and molten aluminum alloy. In some experiments, pure aluminum powder was placed on the sintered SiCp to increase the interfacial area and the chemical reaction between the sintered SiCp and the melt. By combining these conditions, we succeeded in the complete infiltration without pressure at 1173K.

  • Prediction of Graphite Types and Mechanical Properties in Cast Iron Using Three Cups Thermal Analysis

    Toshitake Kanno, Hideo Nakae

    Journal of Japan Foundry Engineering Society   72 ( 3 ) 175 - 180  2000年

    DOI

  • New process for the fabrication of cast aluminum alloy matrix composites

    T Kimura, H Yamaura, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     135 - 140  2000年

     概要を見る

    In 1968 J. N. Reding et al. suggested processes for fabricating composites. According to their patent, decompression atmosphere, which occurs during the reaction between magnesium and oxygen and/or nitrogen in the closed system, causes the spontaneous infiltration of melt into narrow spaces such as ceramic preforms. However, they did not report the proof of this phenomenon or the industrial manufacturing method. Therefore, this research measured the pressure change among SiC particles surrounding molten aluminum. As a result, the pressure reduction during the Mg reaction was identified. Moreover, the existence of Mg,N,, which improves the wettability between Al alloy melt and SiC particles on the interface, was observed on the surface of particles. Applying these two phenomena, a new process for the manufacturing of cast discontinuously reinforced aluminum composites (DRA) was developed. This new method is expected to produce DRA without additional pressure.

  • Influence of gravity on monotectic and eutectic growth

    Aoi, I, M Yoshida, M Ishino, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     1017 - 1022  2000年

     概要を見る

    The influence of gravity on the microstructure of unidirectionally solidified Cu-Pb monotectic, Ag-Si and Fe-C eutectic alloys is studied. In order to examine the influence of gravity in a Ig environment, both the upward (opposite to direction of gravity) and downward (direction of gravity) unidirectional solidifications are carried out. The results are as follows: (1) For the upward solidified Ag-Si eutectic alloy, the eutectic Si continuously grows. On the other hand, in the downward solidified Ag-Si alloy, the Si grows discontinuously and disperses into the a-Ag matrix. (2) No morphological difference in the eutectic growth is observed between the upward and downward solidified Fe-C eutectic alloys. (3) In the case of the upward solidified Cu-Pb monotectic alloy, a banded structure, which consists of Pb-rich layers and Cu-rich layers, is observed. However, such a banded structure is not observed in the downward specimen. (4) The banded structure is not found in the upward solidified Cu-Pb-0.05 mass%Al and Cu-Pb-0.1 mass%Al alloys. In the Cu-Pb-0.05 mass%Al alloy, a fibrous L-2 phase grows continuously parallel to the growth direction at low growth rate. Only 500 mass ppm addition of aluminum induces the morphological change of the monotectic L-2 phase.

  • 鉄鋳物の焼付き性に対する砂の化学組成の影響

    中江 秀雄, 松田 泰明

    鋳造工学 = Journal of Japan Foundry Engineering Society   72 ( 2 ) 102 - 106  2000年

     概要を見る

    &nbsp;&nbsp;The burn-on of iron castings, namely chemical penetration, has posed as one of the main casting defects for a long time. However, no solution has yet been clarified for this intricate phenomena. In this paper, we discuss how the burn-on is affected with the SiO2 content of sands from the standpoint of wettability using the sessile drop method. The apparent contact angle between the sand grains and melt decreases with the formation of FeO slag at the interface, and stop the advancing by the dissolution of SiO2into the slag due to the increase in the melting temperature. The reason why chemical penetration defects can be prevented by the addition of coal dust into mold, is not only due to the decrease the FeO slag formation but also due to the ease of saturation of the slag with SiO2 to increase the melting temperature.

    DOI CiNii

  • Gravitational Influence on the Microsfructure of Directionally Solidified Monofectic and Eutectic Alloys

    Materials Science Forum     329  2000年

  • アルミニウム合金の凝固過程における発泡機構

    楊 錦成, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   72 ( 9 ) 593 - 598  2000年

     概要を見る

    &nbsp;&nbsp;In recent years, there is a high demand for the development of light weight metals in industry. One of the materials is foamed aluminum alloys. In this research, we studied the foaming mechanism for the development of materials using a solidification process.<br>&nbsp;&nbsp;The viscosity in the melt was increased by the oxidation of the melt to form fine Al2O3 particles, and then 1 mass % titanium hydride powder was added to the melt and unidirectionally solidified to make the aluminum alloy foam. Hydrogen bubbles nucleated on the Al2O3 particles at the solid/liquid interface and entrapped in the solid. This shows that the Al2O3 particles not only affect the increase in viscosity but also serve as nucleating agents for the bubbles.

    DOI CiNii

  • Foaming characteristics control during production of aluminum alloy foam.

    Journal of Alloys and Compounds   313 ( 1/2 ) 188 - 191  2000年

    DOI CiNii

  • Foam structure effect on the compression behavior of foamed aluminum alloy

    C. C. Yang, H. Nakae

    ISIJ International   40 ( 12 ) 1283 - 1286  2000年

     概要を見る

    The effect of the foam structure on the compression behavior an A-Si-Mg alloy foam, which was produced by a liquid metal method was experimentally investigated. The compressive stress-strain behavior is discussed due to the deformation of a cell within the foam. It is found that the foam with an 81.3% porosity has both a higher energy absorption capacity and a higher efficiency. The compressive strength decrease as the porosity increases. Experimental result showed that the low compressive strength is attributed to cells imperfection due to the higher porosity.

    DOI CiNii

  • Effect of Mn and Ti on Matrix of High Purity Cast Iron

    Hochul Shin, Hideo Nakae

    Journal of Japan Foundry Engineering Society   72 ( 4 ) 268 - 272  2000年

    DOI

  • Effect of graphite morphology on mechanical properties of cast iron.

    64th World Foundry Cogress    2000年

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Cu-Pb Monotectic Alloy

    Proceedings of MCSP4'99     331 - 339  2000年

  • Formation of Spheroidal Graphite in Fe-C and Ni-C Alloys

    Proceedings of MCSP4'99     57 - 65  2000年

  • Foaming characteristics control during production of aluminum alloy foam

    ELSEVIER   313 ( 1/2 ) 188 - 191  2000年

    DOI

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    65th World Foundry Cogress    2000年

  • The relationship between the variation of eutectic temperature and melt quality in cast iron.

    64th World Foundry Cogress    2000年

  • Effect of graphite morphology on mechanical properties of cast iron.

    67th World Foundry Cogress    2000年

  • Effect of graphite morphology on mechanical properties of cast iron

    66th World Foundry Cogress    2000年

  • Pressurless infiltration into preformed SiCp by Al-Si alloys

    H Nakae, H Yamaura, T Miyamoto, T Yanagihara

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     165 - 168  2000年

     概要を見る

    For the production of partially composed metal matrix composites, namely discontinuous MMCs, using a casting process, the interpenetrated phase composites with SiC particles were fabricated by pressureless infiltration using molten Al-Si alloys. This process is based on a wetting phenomenon, therefore, we discussed the technique based on the reactive wetting.
    The SiC particles coated by diluted water glass were sintered in a mullite Tammann tube and simultaneously infiltrated with molten Al-Si alloys in air at 1173 similar to 1573K. As for the improvement of the wettability between the SiC and the liquid aluminum alloy, Fe3O4 powder was mixed with the water glass due to the thermit reaction between Fe3O4 and molten aluminum alloy. In some experiments, pure aluminum powder was placed on the sintered SiCp to increase the interfacial area and the chemical reaction between the sintered SiCp and the melt. By combining these conditions, we succeeded in the complete infiltration without pressure at 1173K.

  • New process for the fabrication of cast aluminum alloy matrix composites.

    Second international conference on processing materials TMS     35 - 140  2000年

  • Influence of gravity on monotectic and eutectic growth

    Aoi, I, M Yoshida, M Ishino, H Nakae

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES     1017 - 1022  2000年

     概要を見る

    The influence of gravity on the microstructure of unidirectionally solidified Cu-Pb monotectic, Ag-Si and Fe-C eutectic alloys is studied. In order to examine the influence of gravity in a Ig environment, both the upward (opposite to direction of gravity) and downward (direction of gravity) unidirectional solidifications are carried out. The results are as follows: (1) For the upward solidified Ag-Si eutectic alloy, the eutectic Si continuously grows. On the other hand, in the downward solidified Ag-Si alloy, the Si grows discontinuously and disperses into the a-Ag matrix. (2) No morphological difference in the eutectic growth is observed between the upward and downward solidified Fe-C eutectic alloys. (3) In the case of the upward solidified Cu-Pb monotectic alloy, a banded structure, which consists of Pb-rich layers and Cu-rich layers, is observed. However, such a banded structure is not observed in the downward specimen. (4) The banded structure is not found in the upward solidified Cu-Pb-0.05 mass%Al and Cu-Pb-0.1 mass%Al alloys. In the Cu-Pb-0.05 mass%Al alloy, a fibrous L-2 phase grows continuously parallel to the growth direction at low growth rate. Only 500 mass ppm addition of aluminum induces the morphological change of the monotectic L-2 phase.

  • Equilibrium contact angle for Ni/Al systems

    HTC-2000    2000年

  • Foam structure effect on the compression behavior of foamed aluminum alloy

    C. C. Yang, H. Nakae

    ISIJ International   40 ( 12 ) 1283 - 1286  2000年

     概要を見る

    The effect of the foam structure on the compression behavior an A-Si-Mg alloy foam, which was produced by a liquid metal method was experimentally investigated. The compressive stress-strain behavior is discussed due to the deformation of a cell within the foam. It is found that the foam with an 81.3% porosity has both a higher energy absorption capacity and a higher efficiency. The compressive strength decrease as the porosity increases. Experimental result showed that the low compressive strength is attributed to cells imperfection due to the higher porosity.

    DOI

  • Nucleation process control of undercooled stainless steel by external nucleation seed

    JQ Guo, S Tsukamoto, T Kimura, H Nakae

    ACTA MATERIALIA   47 ( 14 ) 3767 - 3778  1999年10月

     概要を見る

    Competitive phase selection of undercooled melts between equilibrium ferrite and metastable austenite has been investigated as a function of undercooling. Stainless steel type 316 was undercooled up to 250 K using an electromagnetic levitation method. The microstructure showed different morphologies depending on the undercooling due to different solid phase transformation mechanisms. However, metastable austenite was not formed during the solidification for the undercooling up to 250 K due to the favorable nucleation kinetics of ferrite. The control of the phase selection has also been attempted using an external nucleation seed. Undercooled melts were touched by Fe-50 at.% Ni powders in the levitation coil, whose lattice constant is almost the same as that of metastable austenite. The microstructure showed a dramatic change in the solidification mode from equilibrium ferrite to metastable austenite during the first stage of the solidification. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

    DOI CiNii

  • Change in surface free energy of silicon in Si/Al-Si systems during wetting measurement by the sessile drop method

    H Nakae, H Katoh

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   63 ( 10 ) 1356 - 1362  1999年10月

     概要を見る

    Wetting phenomenon has been discussed on the basis of the energy balance among solids, liquids and vapors. In these discussions, many researchers have dealt with the surface energy value as an intrinsic parameter. But the extrinsic one, which is changed by the vapor of the liquid, should be used. In this paper we discussed the change in the solid surface energy of solid-Si in the Si/Al-Si systems for equilibrium wetting and nonequilibrium wetting using the sessile drop method. The final objective of this research is the solution of the modification mechanism of Si in Al-Si alloys. The experimental results are as follows;
    1. The surface free energy of Si decreases much due to the Al vapor, but the decrease is less at the (111) face than at the other faces.
    2. The decreasing rate in Si/Al-Si-Sr systems is much higher than in the Si/Al-Si systems.
    3. These phenomena can be recognized by the change in the contact angles with time for the Si/Al-Si and Al-Si-Sr equilibrium systems.

    DOI

  • Nucleation process control of undercooled stainless steel by external nucleation seed

    JQ Guo, S Tsukamoto, T Kimura, H Nakae

    ACTA MATERIALIA   47 ( 14 ) 3767 - 3778  1999年10月

     概要を見る

    Competitive phase selection of undercooled melts between equilibrium ferrite and metastable austenite has been investigated as a function of undercooling. Stainless steel type 316 was undercooled up to 250 K using an electromagnetic levitation method. The microstructure showed different morphologies depending on the undercooling due to different solid phase transformation mechanisms. However, metastable austenite was not formed during the solidification for the undercooling up to 250 K due to the favorable nucleation kinetics of ferrite. The control of the phase selection has also been attempted using an external nucleation seed. Undercooled melts were touched by Fe-50 at.% Ni powders in the levitation coil, whose lattice constant is almost the same as that of metastable austenite. The microstructure showed a dramatic change in the solidification mode from equilibrium ferrite to metastable austenite during the first stage of the solidification. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

    DOI CiNii

  • Nucleation process control of undercooled stainless steel by external nucleation seed

    JQ Guo, S Tsukamoto, T Kimura, H Nakae

    ACTA MATERIALIA   47 ( 14 ) 3767 - 3778  1999年10月

     概要を見る

    Competitive phase selection of undercooled melts between equilibrium ferrite and metastable austenite has been investigated as a function of undercooling. Stainless steel type 316 was undercooled up to 250 K using an electromagnetic levitation method. The microstructure showed different morphologies depending on the undercooling due to different solid phase transformation mechanisms. However, metastable austenite was not formed during the solidification for the undercooling up to 250 K due to the favorable nucleation kinetics of ferrite. The control of the phase selection has also been attempted using an external nucleation seed. Undercooled melts were touched by Fe-50 at.% Ni powders in the levitation coil, whose lattice constant is almost the same as that of metastable austenite. The microstructure showed a dramatic change in the solidification mode from equilibrium ferrite to metastable austenite during the first stage of the solidification. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

    DOI CiNii

  • Change in surface free energy of silicon in Si/Al-Si systems during wetting measurement by the sessile drop method

    H Nakae, H Katoh

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   63 ( 10 ) 1356 - 1362  1999年10月

     概要を見る

    Wetting phenomenon has been discussed on the basis of the energy balance among solids, liquids and vapors. In these discussions, many researchers have dealt with the surface energy value as an intrinsic parameter. But the extrinsic one, which is changed by the vapor of the liquid, should be used. In this paper we discussed the change in the solid surface energy of solid-Si in the Si/Al-Si systems for equilibrium wetting and nonequilibrium wetting using the sessile drop method. The final objective of this research is the solution of the modification mechanism of Si in Al-Si alloys. The experimental results are as follows;
    1. The surface free energy of Si decreases much due to the Al vapor, but the decrease is less at the (111) face than at the other faces.
    2. The decreasing rate in Si/Al-Si-Sr systems is much higher than in the Si/Al-Si systems.
    3. These phenomena can be recognized by the change in the contact angles with time for the Si/Al-Si and Al-Si-Sr equilibrium systems.

    DOI

  • Nucleation process control of undercooled stainless steel by external nucleation seed

    JQ Guo, S Tsukamoto, T Kimura, H Nakae

    ACTA MATERIALIA   47 ( 14 ) 3767 - 3778  1999年10月

     概要を見る

    Competitive phase selection of undercooled melts between equilibrium ferrite and metastable austenite has been investigated as a function of undercooling. Stainless steel type 316 was undercooled up to 250 K using an electromagnetic levitation method. The microstructure showed different morphologies depending on the undercooling due to different solid phase transformation mechanisms. However, metastable austenite was not formed during the solidification for the undercooling up to 250 K due to the favorable nucleation kinetics of ferrite. The control of the phase selection has also been attempted using an external nucleation seed. Undercooled melts were touched by Fe-50 at.% Ni powders in the levitation coil, whose lattice constant is almost the same as that of metastable austenite. The microstructure showed a dramatic change in the solidification mode from equilibrium ferrite to metastable austenite during the first stage of the solidification. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

    DOI CiNii

  • Bubble-growth for a wetting system in the maximum bubble pressure method

    H Nakae, T Fukui

    MATERIALS TRANSACTIONS JIM   40 ( 4 ) 362 - 364  1999年04月

     概要を見る

    This paper describes a new measuring apparatus for the maximum bubble pressure method to cofirm the pressure change pattern during bubble formation for a wetting system. Generally speaking, a sawtooth pressure pattern has been widely accepted by many researchers. Nevertheless, when the accumulated gas volume is very small, the pressure change pattern has a chopping wave pattern.

    DOI

  • Similarty in Solidification mode Between Fe-C and Al-Si Alloys

    Int. J. Cast Metals Res. ,   11   345  1999年

    DOI

  • Nucleation effect of alumina in Al-Si/Al2O3 composites

    Shusen Wu, Hideo Nakae

    Journal of Materials Science Letters   18 ( 4 ) 321 - 323  1999年

     概要を見る

    In the development of Al-Si composites dispersed with ceramic particles by gravity casting, a uniform particles distribution may be obtained if the particle interfacial energy can be decreased and the particle contact angle and the solid/liquid interface is less than 90°. The relationship between the growth morphology of microstructures and particle distribution was examined for Al-Si/Al2O3 composites by directional solidification technique. A uniform Al2O3 particles distribution was realized in Al-Si-Sr-Ca/Al2O3, wherein the Al2O3 particles were not pushed by the growing solid front, but engulfed into the growing front.

    DOI

  • Influeuce of Atmospheric Oxygen on Burn-On of Iron Castings

    中江秀雄, 松田泰明

    鋳造工学   71 ( 1 ) 28 - 33  1999年

    DOI

  • Influence of Gravity on the Microstructure of Directionally Solidified Ag-Si Eutectic Alloy

    Materials Transactions, JIM,   40/1,27  1999年

    DOI

  • Improvement in Mechanical Properties of Cast Iron with Inoculation

    Proceedings of the Sixth Asian Foundry Congress     78  1999年

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Monotectic and Eutectic Alloys

    Third International Conference on Solidification and Gravity   G0003   54  1999年

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Cu-Pb Monotectic Alloy

    Modeling of Casting and Solidification Processes   4   331 - 339  1999年

  • Formation of Spheroidal GraPhite in Fe-C and Ni-C Alloys

    Modeling of Casting and Solidification Processes   4   57 - 65  1999年

  • Express in significant figures-An arithmetic problem in engineering

    J. JILM   ( 49 ) 412  1999年

  • Effects of Sohid/Liguid/Vapor Three-Phase Line on Contact Angle

    Journal of Material Testing Research   44 ( 2 ) 29  1999年

  • Effects of Graphite Morphology and P and S Contents on Mechanical Properties of Cast Iron

    中江秀雄, SHIN H

    鋳造工学   71 ( 2 ) 79 - 84  1999年

     概要を見る

    &nbsp;&nbsp;It is well-known that the strength of flake graphite cast iron is controlled by the morphology of the graphite. Studies on the strength of flake graphite cast iron have mainly been discussed in relation to the shape of graphite as a notch effect so far. However, the observation of the graphite shape with a microscope to evaluate only by the notch defect raises certain doubts. We therefore investigated the effect of the graphite tip radius on the mechanical properies of cast iron (Experiment-1). In Experiment-2, using pure Fe-C-Si cast iron (3.4 mass % Cand 1.8 mass % Si) as the parent material, we evaluated the influence of minor elements such as P and S on the microstructure, and tensile properties of as-cast and ferritized samples.

    DOI CiNii

  • Bubble-Growth for a Wetting System in the Maximum Bubble Pressure Method

    Materials Transactions, JIM,   40 ( 4 ) 362  1999年

    DOI

  • Base of femperature mesurement

    J.JILM   49   461 - 464  1999年

  • 鋳造物の鋳型の焼付きに対する雰囲気酸素の影響

    中江秀雄, 松田泰明

    鋳造工学/日本鋳造工学会   71 ( 1 ) 28 - 33  1999年

    DOI CiNii

  • Inprovement in Mechanical Properties of Cast Iron with Inoculation

    Proceedings of the Sixth Asian Foundry congress / The Institute of Indian Foundrymen     78 - 82  1999年

  • Influence of gravity on the microstructure of directionally solidified Ag-Si eutectic alloy

    Aoi, I, M Yoshida, H Fukunaga, H Nakae

    MATERIALS TRANSACTIONS JIM   40 ( 1 ) 27 - 33  1999年01月

     概要を見る

    In order to study the influence of gravity on the eutectic growth of Ag-Si and Al-Si alloys, both the downward (direction of gravity) and upward (opposite to direction of gravity) unidirectional solidifications were carried out. In the case of the downward U.D.S., the molten metal is confined between the crucible and solid. This inevitably produces the shrinkage cavity at the solid/liquid interface during solidification. In this study, the zone-melting technique was used to avoid this cavity formation. The results of this study were as follows:
    (1) In the case of the downward U.D.S. of the Ag-Si alloy, the eutectic silicon phase grew discontinuously and dispersed in the alpha-Ag phase with a diameter of several micrometers. This is caused by the large difference in specific density between silver and the silicon phase. On the other hand, in the case of the upward U.D.S., the silicon phase grew continuously and its morphology showed the typical faceted/non-faceted eutectic.
    (2) The eutectic silicon phase of the Al-Si alloy grew continuously regardless of growth direction. There was no morphological difference between the upward and downward U.D.S. specimens.

    DOI

  • 固体/液体/気体 三相線が接触角に及ぼす影響

    斎藤 博之, 山内 五郎, 高井 健一

    材料試験技術   44 ( 2 ) 97 - 99  1999年

    CiNii

  • Similarity in solidification mode between Fe-C and Al-Si alloys

    H Nakae, H Shin

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   11 ( 5 ) 345 - 349  1999年

     概要を見る

    For the discussion of the formation of spherical graphite in Fe-C alloys, the solid/liquid interfacial morphology of Fe-C alloys was studied using a self-sealing UDS compared with Al-Si alloys. The influence of sulfur on the Fe-C alloys and strontium on the Al-Si alloys was investigated in order to discuss the change in the morphology of the eutectic graphite and silicon. The experimental results are as follows:
    If the low sulfur Fe-C alloy contains cerium, the alloy solidifies as spheroidal graphite in the usual solidification. Nevertheless, the structure of the UDS sample is flake-like and identical with that of the 0.003 mass % S sample.
    The graphite of the Fe-C-0,003 mass % S sample at the sn interface is covered with the gamma-Fe, but the graphite morphology is flake-like. The solidification rate becomes more than 4 mm/h, and the melt solidifies as undercooled graphite by the branching of the graphite.
    These phenomena are identical with the effect of strontium in Al-Si samples.

    DOI

  • Nucleation Effect oh Alumina in Al-Si/Al2O3 Composites

    WU S, NAKAE H

    Journal of Materials Science Letters   18 ( 4 ) 321 - 323  1999年

    DOI CiNii

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Monotectic and Eutectic Alloys

    Third International Conference on Solidification and Gravity     54 - 55  1999年

  • 発砲アルミニウムの気泡生成機構の解明

    第134回日本鋳造工学会全国講演大会    1999年

  • 鋳鉄の接種効果に対する一考察

    第134回日本鋳造工学会全国講演大会    1999年

  • 鋳鉄の機械的性質に及ぼすP,S,MnとTiの影響

    第134回日本鋳造工学会全国講演大会    1999年

  • 有効数字の扱い―工学の算数,足し算・掛け算

    軽金属   49 ( 8 ) 412 - 414  1999年

  • 金属材料活用事典

    株)産業調査会     849 - 855  1999年

  • 温度測定の基礎

    軽金属   49 ( 9 ) 461 - 464  1999年

  • Influence of Ca on Modification of Si in Al-Si Alloys: Interfacial Energy and Solidification Structure

    The Second Oxford Kobe Materials Seminar:Solidification and Casting     127 - 137  1999年

  • 溶融Al-Znめっき鋼板の合金化によるめっき構造の変化

    第135回日本鋳造工学会全国講演大会    1999年

  • 鋳鉄の黒鉛組織に及ぼす冷却速度とTi量の影響

    第135回日本鋳造工学会全国講演大会    1999年

  • 静滴法によるSiと溶融Al-Siの濡れ測定時におけるSiの表面自由エネルギーの変化

    日本金属学会誌   63 ( 10 ) 1356 - 1362  1999年

    DOI

  • リサイクル産業としての鋳造業

    第135回日本鋳造工学会全国講演大会    1999年

  • ZnとMgを含むADC12系合金の溶湯酸化機構

    第135回日本鋳造工学会全国講演大会    1999年

  • Fe-Ni-C合金における黒鉛形態に及ぼす冷却速度の影響

    第135回日本鋳造工学会全国講演大会    1999年

  • Fe-C合金の過冷凝固

    第135回日本鋳造工学会全国講演大会    1999年

  • 溶融アルミニウム合金とほう酸アルミニウムウィスカの濡れに及ぼすガラスバインダの影響

    軽金属学会第97回秋期講演大会    1999年

  • 一方向凝固した共晶合金の凝固組織に及ぼす重力の影響

    日本金属学会秋期講演大会    1999年

  • 一方向凝固したアルミニウム基合金の凝固組織に及ぼす重力の影響

    軽金属学会第97回秋期講演大会    1999年

  • 一方向に凝固したNi-Al共晶合金の第二相の形態遷移現象

    日本金属学会秋期講演大会    1999年

  • NbとAl融液の界面反応によるNb3Alの作成

    日本金属学会秋期講演大会    1999年

  • Gravitational Influence on the Microstructure of Directionally Solidified Monotectic and Eutectic Alloys

    Materials Science Forum   329 ( 330 ) 259 - 264  1999年

  • Cu/Sn系における濡れに及ぼす物質移動の影響

    日本金属学会秋期講演大会    1999年

  • 溶融Alの発砲機構について

    第4回セル構造体勉強会    1999年

  • Similarty in Solidification mode Between Fe-C and Al-Si Alloys

    Int. J. Cast Metals Res. ,   11   345  1999年

    DOI

  • Nucleation effect of alumina in Al-Si/Al2O3 composites

    Shusen Wu, Hideo Nakae

    Journal of Materials Science Letters   18 ( 4 ) 321 - 323  1999年

     概要を見る

    In the development of Al-Si composites dispersed with ceramic particles by gravity casting, a uniform particles distribution may be obtained if the particle interfacial energy can be decreased and the particle contact angle and the solid/liquid interface is less than 90°. The relationship between the growth morphology of microstructures and particle distribution was examined for Al-Si/Al2O3 composites by directional solidification technique. A uniform Al2O3 particles distribution was realized in Al-Si-Sr-Ca/Al2O3, wherein the Al2O3 particles were not pushed by the growing solid front, but engulfed into the growing front.

    DOI

  • Influeuce of Atmospheric Oxygen on Burn-On of Iron Castings

    Journal of Japan Foundry Engineering Society   71 ( 1 ) 28 - 33  1999年

    DOI

  • Influence of Gravity on the Microstructure of Directionally Solidified Ag-Si Eutectic Alloy

    Materials Transactions, JIM,   40/1,27  1999年

    DOI

  • Improvement in Mechanical Properties of Cast Iron with Inoculation

    Proceedings of the Sixth Asian Foundry Congress     78  1999年

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Monotectic and Eutectic Alloys

    Third International Conference on Solidification and Gravity   G0003   54  1999年

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Cu-Pb Monotectic Alloy

    Modeling of Casting and Solidification Processes   4   331 - 339  1999年

  • Formation of Spheroidal GraPhite in Fe-C and Ni-C Alloys

    Modeling of Casting and Solidification Processes   4   57 - 65  1999年

  • Express in significant figures-An arithmetic problem in engineering

    J. JILM   ( 49 ) 412  1999年

  • Effects of Sohid/Liguid/Vapor Three-Phase Line on Contact Angle

    Journal of Material Testing Research   44 ( 2 ) 29  1999年

  • 鋳鉄の黒鉛形態と機械的性質に及ぼすりんと硫黄の影響

    辛 昊〓, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   71 ( 2 ) 79 - 84  1999年

     概要を見る

    &nbsp;&nbsp;It is well-known that the strength of flake graphite cast iron is controlled by the morphology of the graphite. Studies on the strength of flake graphite cast iron have mainly been discussed in relation to the shape of graphite as a notch effect so far. However, the observation of the graphite shape with a microscope to evaluate only by the notch defect raises certain doubts. We therefore investigated the effect of the graphite tip radius on the mechanical properies of cast iron (Experiment-1). In Experiment-2, using pure Fe-C-Si cast iron (3.4 mass % Cand 1.8 mass % Si) as the parent material, we evaluated the influence of minor elements such as P and S on the microstructure, and tensile properties of as-cast and ferritized samples.

    DOI CiNii

  • Bubble-Growth for a Wetting System in the Maximum Bubble Pressure Method

    Materials Transactions, JIM,   40 ( 4 ) 362  1999年

    DOI

  • Base of femperature mesurement

    J.JILM   49   461 - 464  1999年

  • Inprovement in Mechanical Properties of Cast Iron with Inoculation

    Proceedings of the Sixth Asian Foundry congress / The Institute of Indian Foundrymen     78 - 82  1999年

  • Influence of gravity on the microstructure of directionally solidified Ag-Si eutectic alloy

    Ichiro Aoi, Makoto Yoshida, Hideharu Fukunaga, Hideo Nakae

    Materials Transactions, JIM   40 ( 1 ) 27 - 33  1999年

     概要を見る

    In order to study the influence of gravity on the eutectic growth of Ag-Si and Al-Si alloys, both the downward (direction of gravity) and upward (opposite to direction of gravity) unidirectional solidifications were carried out. In the case of the downward U.D.S., the molten metal is confined between the crucible and solid. This inevitably produces the shrinkage cavity at the solid/liquid interface during solidification. In this study, the zone-melting technique was used to avoid this cavity formation. The results of this study were as follows: (1) In the case of the downward U.D.S. of the Ag-Si alloy, the eutectic silicon phase grew discontinuously and dispersed in the α-Ag phase with a diameter of several micrometers. This is caused by the large difference in specific density between silver and the silicon phase. On the other hand, in the case of the upward U.D.S., the silicon phase grew continuously and its morphology showed the typical faceted/non-faceted eutectic. (2) The eutectic silicon phase of the Al-Si alloy grew continuously regardless of growth direction. There was no morphological difference between the upward and downward U.D.S. specimens.

    DOI

  • Similarity in solidification mode between Fe-C and Al-Si alloys

    H Nakae, H Shin

    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH   11 ( 5 ) 345 - 349  1999年

     概要を見る

    For the discussion of the formation of spherical graphite in Fe-C alloys, the solid/liquid interfacial morphology of Fe-C alloys was studied using a self-sealing UDS compared with Al-Si alloys. The influence of sulfur on the Fe-C alloys and strontium on the Al-Si alloys was investigated in order to discuss the change in the morphology of the eutectic graphite and silicon. The experimental results are as follows:
    If the low sulfur Fe-C alloy contains cerium, the alloy solidifies as spheroidal graphite in the usual solidification. Nevertheless, the structure of the UDS sample is flake-like and identical with that of the 0.003 mass % S sample.
    The graphite of the Fe-C-0,003 mass % S sample at the sn interface is covered with the gamma-Fe, but the graphite morphology is flake-like. The solidification rate becomes more than 4 mm/h, and the melt solidifies as undercooled graphite by the branching of the graphite.
    These phenomena are identical with the effect of strontium in Al-Si samples.

    DOI

  • Nucleation Effect oh Alumina in Al-Si/Al2O3 Composites

    Journal of Materials Science Letters   18 ( 4 ) 321 - 323  1999年

    DOI CiNii

  • Gravitational Effect on the Microstructure of Unidirectionally Solidified Monotectic and Eutectic Alloys

    Third International Conference on Solidification and Gravity     54 - 55  1999年

  • Bubble-growth for a wetting system in the maximum bubble pressure method

    Hideo Nakae, Tomoaki Fukui

    Materials Transactions, JIM   40 ( 4 ) 362 - 364  1999年

     概要を見る

    This paper describes a new measuring apparatus for the maximum bubble pressure method to confirm the pressure change pattern during bubble formation for a wetting system. Generally speaking, a sawtooth pressure pattern has been widely accepted by many researchers. Nevertheless, when the accumulated gas volume is very small, the pressure change pattern has a chopping wave pattern.

    DOI

  • Influence of Ca on Modification of Si in Al-Si Alloys: Interfacial Energy and Solidification Structure

    The Second Oxford Kobe Materials Seminar:Solidification and Casting     127 - 137  1999年

  • Gravitational Influence on the Microstructure of Directionally Solidified Monotectic and Eutectic Alloys

    Materials Science Forum   329 ( 330 ) 259 - 264  1999年

  • Engulfment of Al2O3 particles during solidification of aluminum matrix composites

    H Nakae, SS Wu

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   252 ( 2 ) 232 - 238  1998年09月

     概要を見る

    Through the analysis of forces acting on the particles at the solid/liquid interface based on the interfacial energies, we propose a new theoretical particle transfer model. This model can predict the behavior of the particles at the interface. The main concept of this model is proved by the mutual wetting behavior among the solid, liquid and particle phases. If the contact angle at a solid/liquid interface and a particle is &lt; 90 degrees, the particle can be engulfed into the solid, and if the contact angle is &gt; 90 degrees, the particle would be pushed. This contact angle is measured by unidirectional solidification (UDS) experiments. But if solidification experiments were carried out for particle dispersed composites in a conventional UDS, the particles completely descended before freezing, therefore, a zone-UDS was used in the experiment. In Al-Sr, Al-Ca and AI-Ce matrix composites, Al2O3 particles are pushed by the solid because the contact angles are &gt; 90 degrees. On the other hand, in Al-12.6wt.%Si-Sr-Al2O3 composites alloyed with Ca, the Al2O3 particles are engulfed into the solid because the contact angle is &lt; 90 degrees. (C) 1998 Elsevier Science S.A. All rights reserved.

  • Effects of surface roughness on wettability

    H Nakae, R Inui, Y Hirata, H Saito

    ACTA MATERIALIA   46 ( 7 ) 2313 - 2318  1998年04月

     概要を見る

    The effects of surface roughness on wettability have been studied by many researchers using surface roughness factors such as the Wenzel roughness factor and so on. However, these Factors depend on each other which makes a precise discussion difficult. We adopted two kinds of model, a hemispherical close-packed model and a hemiround-rods close-packed model. Using these models, the changes in height roughness, namely the radius, can be varied without changing the Wenzel roughness factors. This paper analyzed the influence of surface height roughness on wettability using the sessile drop method with nonwetting paraffin!water systems. For the hemispherical close-packed models, the effect of height roughness on wetting can be explained by the change in the radius of curvature, R, of the liquid in trapped air pockets at the solid/liquid interface. When the height roughness, h, is more than 125 mu m, R is constant at 50 mu m, but when h is less than 125 mu m, R is conjectured to be a function of the h, theta and gamma(LV) values. From these discussions, we define the wettable flat surface and the atomistic flat surface. In the case of the hemiround-rods close-packed models, we find that the contact angles, measured from the direction parallel to the rods, resemble the advancing and receding angles of contact angle hysteresis. (C) 1998 Acta Metallurgica Inc.

    DOI

  • Effects of surface roughness on wettability

    H Nakae, R Inui, Y Hirata, H Saito

    ACTA MATERIALIA   46 ( 7 ) 2313 - 2318  1998年04月

     概要を見る

    The effects of surface roughness on wettability have been studied by many researchers using surface roughness factors such as the Wenzel roughness factor and so on. However, these Factors depend on each other which makes a precise discussion difficult. We adopted two kinds of model, a hemispherical close-packed model and a hemiround-rods close-packed model. Using these models, the changes in height roughness, namely the radius, can be varied without changing the Wenzel roughness factors. This paper analyzed the influence of surface height roughness on wettability using the sessile drop method with nonwetting paraffin!water systems. For the hemispherical close-packed models, the effect of height roughness on wetting can be explained by the change in the radius of curvature, R, of the liquid in trapped air pockets at the solid/liquid interface. When the height roughness, h, is more than 125 mu m, R is constant at 50 mu m, but when h is less than 125 mu m, R is conjectured to be a function of the h, theta and gamma(LV) values. From these discussions, we define the wettable flat surface and the atomistic flat surface. In the case of the hemiround-rods close-packed models, we find that the contact angles, measured from the direction parallel to the rods, resemble the advancing and receding angles of contact angle hysteresis. (C) 1998 Acta Metallurgica Inc.

    DOI

  • Shape of Equiaxed Grains, from our Student Experiment

    中江 秀雄

    Materia Japan   37 ( 11 ) 953 - 955  1998年

    DOI

  • Reactive and Nonreactive Wetting

    Proc. Int. Cont. High Temperature Capillarity     12  1998年

  • Prediction of Chilling Tendency in Cast Iron Using Three Cups Thermal Analysis System

    菅野利猛, YOU Y, KANG I, 森中真行, 中江秀雄

    鋳造工学   70 ( 11 ) 773 - 778  1998年

     概要を見る

    &nbsp;&nbsp;Using a thermal analysis system consisting of three cups (First : Inoculated, Second : Base melt, Third : Tellurium added), the relationship between the thermal analysis curve and chill depth was investigated. The content of the alloying elements, such as C, Si and Cr, varies the graphite and cementite eutectic temperature and the difference between them, &Delta;TE. It is, therefore, impossible to predict the chill depth correctly only from the cooling curve, or by ignoring &Delta;TE. However, use of the &Delta;T1/&Delta;TE value, which is the dimensionless chilling tendency of melt, enables correct prediction of the chill depth. Regardless of the variation of contents and elements, the relation between the chill depth (D, mm) and &Delta;T1/&Delta;TE is as follow : D=-27 (&Delta;T1/&Delta;TE) + 26. It can be concluded that thermal analysis system consisting of three cups serves as an efficient method for the rapid prediction of chilling tendency of cast iron melts.

    DOI CiNii

  • INFLUENCE OF MINOR ELEMENTS ON PROPERTIES OF PURE FE-C-SI CAST IRON

    63RD World Foundry Congress   63 ( 27 ) 1  1998年

  • Influence of Gravity on the Microstructure of Directienally Soliditied Al-In Monotectic Alloy

    J. Japan Inst. Metals   62 ( 1 ) 85  1998年

    DOI

  • Engulfment of Al2O3 particles during solidification of aluminum matrix composites

    Meterials Science and Engineering   A252   232  1998年

  • Effects of Trace Element on Ferritization of High Purity Cast Iron

    SHIN H, 中江秀雄

    鋳造工学   70 ( 8 ) 569 - 574  1998年

     概要を見る

    &nbsp;&nbsp;The ferritizing process of high purity cast iron was investigated. Specimens used for the experiments were pure Fe-C-Si, Fe-C-Si-P, Fe-C-Si-S, Fe-C-Si-P-S alloys and commercial grade cast iron. The specimens used for the investigation were packed in a container with electrode graphite and fully annealed during two stages in air or argon atmospheres. The first stage was fixed at 1173K for 3 hours while the second stage, the cooling stage from 1173K to 973K was performed at various times such as 5, 10, 20, 40, 80 hours. The results obtained were as follows : 1) The ferritization of pure alloy is difficult to compare with that of commercial grade cast iron. 2) The pure alloys are ferritized easily in argon atmosphere annealing. 3) The titanium in the commercial grade cast iron combines with the nitrogen in iron to form TiN. As it decreases the effect of nitrogen on pearlitization, the ferritization is accelerated. 4) Due to the low Ti content of pure alloys, nitriding occurs when heat treatment is performed, thus preventing ferritization. 5) The ferritizing speed of the specimens decreases in the following order C. G. , 7P, 7P-4S, B, 4S.

    DOI CiNii

  • Effects of Surface Ronghness on Wettability

    Acta mater   46 ( 7 ) 2312  1998年

    DOI

  • Effect of Alloying Elements on Graphite and Cementite Eutectic Temperature of Cast Iron

    菅野利猛, YOU Y, 森中真行, 中江秀雄

    鋳造工学   70 ( 7 ) 465 - 470  1998年

    DOI CiNii

  • Development of New Induction Furnace for Surface Treatment Steel Scrap Melting

    63RD World Foundry Congress   63 ( 26 ) 1  1998年

  • Behavior of Particles at Solidification Interface of Aluminum Matrix Composites

    ACTA METALLURGICA SINICA   34 ( 9 ) 939  1998年

  • 一方向凝固したAl-ln偏晶合金の凝固組織に及ぼす重力の影響

    日本金属学会誌   62 ( 1 ) 85 - 91  1998年

    DOI

  • Si/Al-Si, Ni/Al-Ni系による非平衡ぬれ

    鉄と鋼   84 ( 1 ) 19 - 24  1998年

    DOI

  • 高純度Fe-C-Si鋳鉄の黒鉛形態と機械的性質に及ぼす不純物元素の影響

    韓国鋳造工学会誌     11 - 20  1998年

  • 結晶成長と凝固

    アグネ承風社    1998年

  • 鋳鉄の共晶温度に対する各種合金元素の影響

    菅野 利猛, 葉 椰, 森中 真行, 中江 秀雄

    鋳造工学/日本鋳造工学会   70 ( 7 ) 465 - 470  1998年

    DOI CiNii

  • Reactive and Nonreactive Wetting

    High Temperature Capillarity / Foundry Research Institute     12 - 17  1998年

  • 高純度鋳鉄の基地組織に及ぼす微量元素の影響

    辛 昊〓, 中江 秀雄

    鋳造工学/日本鋳造工学会   70 ( 8 ) 569 - 574  1998年

     概要を見る

    &nbsp;&nbsp;The ferritizing process of high purity cast iron was investigated. Specimens used for the experiments were pure Fe-C-Si, Fe-C-Si-P, Fe-C-Si-S, Fe-C-Si-P-S alloys and commercial grade cast iron. The specimens used for the investigation were packed in a container with electrode graphite and fully annealed during two stages in air or argon atmospheres. The first stage was fixed at 1173K for 3 hours while the second stage, the cooling stage from 1173K to 973K was performed at various times such as 5, 10, 20, 40, 80 hours. The results obtained were as follows : 1) The ferritization of pure alloy is difficult to compare with that of commercial grade cast iron. 2) The pure alloys are ferritized easily in argon atmosphere annealing. 3) The titanium in the commercial grade cast iron combines with the nitrogen in iron to form TiN. As it decreases the effect of nitrogen on pearlitization, the ferritization is accelerated. 4) Due to the low Ti content of pure alloys, nitriding occurs when heat treatment is performed, thus preventing ferritization. 5) The ferritizing speed of the specimens decreases in the following order C. G. , 7P, 7P-4S, B, 4S.

    DOI CiNii

  • Interaction of Ceramic Particles with Solidifying Metal Front

    特殊鋳造及有色合金   3期  1998年

  • Development of New Induction Furnace for Surface Treatment Steel Scrap Melting

    63rd World foundry Congress   T9-27  1998年

  • Behavior of Particles at Solodification Interface of Aluminum Matrix Composites

    Acta Metallurgica Sinica   34 ( 9 ) 939 - 944  1998年

  • 等軸晶の形―学生実験から

    中江 秀雄

    まてりあ/日本金属学会   37 ( 11 ) 953 - 955  1998年

    DOI CiNii

  • 3カップ熱分析法によるチルの炉前判定

    菅野 利猛, 葉 椰, 姜 一求, 森中 真行, 中江 秀雄

    鋳造工学/日本鋳造工学会   70 ( 11 ) 773 - 778  1998年

     概要を見る

    &nbsp;&nbsp;Using a thermal analysis system consisting of three cups (First : Inoculated, Second : Base melt, Third : Tellurium added), the relationship between the thermal analysis curve and chill depth was investigated. The content of the alloying elements, such as C, Si and Cr, varies the graphite and cementite eutectic temperature and the difference between them, &Delta;TE. It is, therefore, impossible to predict the chill depth correctly only from the cooling curve, or by ignoring &Delta;TE. However, use of the &Delta;T1/&Delta;TE value, which is the dimensionless chilling tendency of melt, enables correct prediction of the chill depth. Regardless of the variation of contents and elements, the relation between the chill depth (D, mm) and &Delta;T1/&Delta;TE is as follow : D=-27 (&Delta;T1/&Delta;TE) + 26. It can be concluded that thermal analysis system consisting of three cups serves as an efficient method for the rapid prediction of chilling tendency of cast iron melts.

    DOI CiNii

  • Shape of Equiaxed Grains, from our Student Experiment

    Hideo Nakae

    Materia Japan   37 ( 11 ) 953 - 955  1998年

    DOI

  • Reactive and Nonreactive Wetting

    Proc. Int. Cont. High Temperature Capillarity     12  1998年

  • 3カップ熱分析法によるチルの炉前判定

    菅野 利猛, 葉 椰, 姜 一求, 森中 真行, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   70 ( 11 ) 773 - 778  1998年

     概要を見る

    &nbsp;&nbsp;Using a thermal analysis system consisting of three cups (First : Inoculated, Second : Base melt, Third : Tellurium added), the relationship between the thermal analysis curve and chill depth was investigated. The content of the alloying elements, such as C, Si and Cr, varies the graphite and cementite eutectic temperature and the difference between them, &Delta;TE. It is, therefore, impossible to predict the chill depth correctly only from the cooling curve, or by ignoring &Delta;TE. However, use of the &Delta;T1/&Delta;TE value, which is the dimensionless chilling tendency of melt, enables correct prediction of the chill depth. Regardless of the variation of contents and elements, the relation between the chill depth (D, mm) and &Delta;T1/&Delta;TE is as follow : D=-27 (&Delta;T1/&Delta;TE) + 26. It can be concluded that thermal analysis system consisting of three cups serves as an efficient method for the rapid prediction of chilling tendency of cast iron melts.

    DOI CiNii

  • INFLUENCE OF MINOR ELEMENTS ON PROPERTIES OF PURE FE-C-SI CAST IRON

    63RD World Foundry Congress   63 ( 27 ) 1  1998年

  • Influence of Gravity on the Microstructure of Directienally Soliditied Al-In Monotectic Alloy

    J. Japan Inst. Metals   62 ( 1 ) 85  1998年

    DOI

  • Engulfment of Al2O3 particles during solidification of aluminum matrix composites

    Meterials Science and Engineering   A252   232  1998年

  • 高純度鋳鉄の基地組織に及ぼす微量元素の影響

    辛 昊〓, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   70 ( 8 ) 569 - 574  1998年

     概要を見る

    &nbsp;&nbsp;The ferritizing process of high purity cast iron was investigated. Specimens used for the experiments were pure Fe-C-Si, Fe-C-Si-P, Fe-C-Si-S, Fe-C-Si-P-S alloys and commercial grade cast iron. The specimens used for the investigation were packed in a container with electrode graphite and fully annealed during two stages in air or argon atmospheres. The first stage was fixed at 1173K for 3 hours while the second stage, the cooling stage from 1173K to 973K was performed at various times such as 5, 10, 20, 40, 80 hours. The results obtained were as follows : 1) The ferritization of pure alloy is difficult to compare with that of commercial grade cast iron. 2) The pure alloys are ferritized easily in argon atmosphere annealing. 3) The titanium in the commercial grade cast iron combines with the nitrogen in iron to form TiN. As it decreases the effect of nitrogen on pearlitization, the ferritization is accelerated. 4) Due to the low Ti content of pure alloys, nitriding occurs when heat treatment is performed, thus preventing ferritization. 5) The ferritizing speed of the specimens decreases in the following order C. G. , 7P, 7P-4S, B, 4S.

    DOI CiNii

  • Effects of Surface Ronghness on Wettability

    Acta mater   46 ( 7 ) 2312  1998年

    DOI

  • 鋳鉄の共晶温度に対する各種合金元素の影響

    菅野 利猛, 葉 椰, 森中 真行, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   70 ( 7 ) 465 - 470  1998年

    DOI CiNii

  • Development of New Induction Furnace for Surface Treatment Steel Scrap Melting

    63RD World Foundry Congress   63 ( 26 ) 1  1998年

  • Behavior of Particles at Solidification Interface of Aluminum Matrix Composites

    ACTA METALLURGICA SINICA   34 ( 9 ) 939  1998年

  • Reactive and Nonreactive Wetting

    High Temperature Capillarity / Foundry Research Institute     12 - 17  1998年

  • Engulfment of Al2O3 Particles During Solidification of Aluminum Matrix Composites

    Materials Science and Engineering   A252   232 - 238  1998年

  • Development of New Induction Furnace for Surface Treatment Steel Scrap Melting

    63rd World foundry Congress   T9-27  1998年

  • Behavior of Particles at Solodification Interface of Aluminum Matrix Composites

    Acta Metallurgica Sinica   34 ( 9 ) 939 - 944  1998年

  • Infiltration and combustion synthesis of an intermetallic compound Ni3Al

    H Nakae, H Fujii, K Nakajima, A Goto

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   223 ( 1-2 ) 21 - 28  1997年02月

     概要を見る

    Utilising a combination of infiltration and combustion synthesis, a new method for fabricating a high melting point metallic compound (Ni3Al) with only a few pores and little change in the shape, al a low temperature and at atmospheric pressure, has been established. The main procedure for this method is the dropping of molten aluminium or Al-Ni alloys (Ni content up to 18 mass%) onto a sintered nickel sample with 34-36 vol.% pores at 1073 K. Immediately after a molten aluminium or an Al-Ni alloy is dropped onto a sintered nickel sample, the molten metal infiltrates into the sintered material accompanied by an exothermic reaction. When a molten Al-Ni alloy (with a nickel content of over 10 mass%) is dropped, a Ni3Al material is fabricated with only a few pores and little change in the shape. The addition of nickel to the drop delays the onset of the interfacial reaction though the total heat produced is not very different. The delay in the onset of the interfacial reaction allows the infiltration to finish or proceed to some extent before a certain critical point in the interfacial reaction. As a result, a uniform Ni3Al compound is produced. The experimental data clearly relate to the adiabatic combustion temperatures, which indicates that the heat loss is relatively low. As a result, a high melting point metallic compound can be produced at a low temperature and at atmospheric pressure. (C) 1997 Elsevier Science S.A.

  • Infiltration and combustion synthesis of an intermetallic compound Ni3Al

    H Nakae, H Fujii, K Nakajima, A Goto

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   223 ( 1-2 ) 21 - 28  1997年02月

     概要を見る

    Utilising a combination of infiltration and combustion synthesis, a new method for fabricating a high melting point metallic compound (Ni3Al) with only a few pores and little change in the shape, al a low temperature and at atmospheric pressure, has been established. The main procedure for this method is the dropping of molten aluminium or Al-Ni alloys (Ni content up to 18 mass%) onto a sintered nickel sample with 34-36 vol.% pores at 1073 K. Immediately after a molten aluminium or an Al-Ni alloy is dropped onto a sintered nickel sample, the molten metal infiltrates into the sintered material accompanied by an exothermic reaction. When a molten Al-Ni alloy (with a nickel content of over 10 mass%) is dropped, a Ni3Al material is fabricated with only a few pores and little change in the shape. The addition of nickel to the drop delays the onset of the interfacial reaction though the total heat produced is not very different. The delay in the onset of the interfacial reaction allows the infiltration to finish or proceed to some extent before a certain critical point in the interfacial reaction. As a result, a uniform Ni3Al compound is produced. The experimental data clearly relate to the adiabatic combustion temperatures, which indicates that the heat loss is relatively low. As a result, a high melting point metallic compound can be produced at a low temperature and at atmospheric pressure. (C) 1997 Elsevier Science S.A.

  • Unidirectional Solidification of Particle Dispersed Composites by Zone Melting Method

    呉 樹森, 中江 秀雄

    鋳造工学   69 ( 1 ) 3 - 8  1997年

     概要を見る

    &nbsp;&nbsp;Unidirectional solidification experiments have been carried out in Al/Al2O3 composites by using the zone-melting process. The experimental results show as follows. When the volume fraction of Al2O3 particles is 5&sim;20vol %, particles can be distributed uniformly in the solidified samples. But particle settling still occurs in the liquid, and becomes severer as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20&sim;22 vol %, no further settling occurs under a solidification velocity of 8&sim;16 mm/h. The solidification rate has a very small effect on the settling height with the same particle contents. In order to investegate the interaction of solid/liquid interface and particles, a main solidification experiment was carried out using the samples made in the above mentioned experiment. The Al2O3 particles are pushed by the growing solid phase under a solidification velocity of 2mm/h. The particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries.

    DOI CiNii

  • Infiltration and combustion synthesis of an intermenallic Compound Ni3 A1

    Materials Science and Engineering   A225   21 - 28  1997年

  • Behavior of Ceramic Particles at Solid/Liquid Interface during Solidification of Metal Matrix Composites

    Key Engineering Materials   127 ( 131 ) 503 - 510  1997年

  • 帯溶融法を利用した粒子添加複合材料の一方向凝固

    呉 樹森, 中江 秀雄

    鋳造工学/日本鋳造工学会   69 ( 1 ) 3 - 8  1997年

     概要を見る

    &nbsp;&nbsp;Unidirectional solidification experiments have been carried out in Al/Al2O3 composites by using the zone-melting process. The experimental results show as follows. When the volume fraction of Al2O3 particles is 5&sim;20vol %, particles can be distributed uniformly in the solidified samples. But particle settling still occurs in the liquid, and becomes severer as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20&sim;22 vol %, no further settling occurs under a solidification velocity of 8&sim;16 mm/h. The solidification rate has a very small effect on the settling height with the same particle contents. In order to investegate the interaction of solid/liquid interface and particles, a main solidification experiment was carried out using the samples made in the above mentioned experiment. The Al2O3 particles are pushed by the growing solid phase under a solidification velocity of 2mm/h. The particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries.

    DOI CiNii

  • 造粒ウィスカプリフォームへの溶融アルミニウムの加圧含浸挙動

    日本金属学会誌/日本金属学会   62 ( 2 )  1997年

  • Behavior of Ceramic Ponticles at S/L Interface during Solidification of MMC

    Key Eng.Materials Trans Tech pub     127 - 131  1997年

  • Reactive and nonreactive wettings

    Proc. 2nd H.T.C     2 - 3  1997年

  • Modification of Al-Si Alloy Using Strontium and its Mechanism

    Proceedings of the 4th Decennial International Conference on Solidification Processing. Sheffield   1997 ( July ) 477 - 480  1997年

  • 粒子分散型金属基複合材料における粒子の凝固界面での挙動

    呉 樹森, 中江 秀雄

    鋳造工学   69 ( 9 ) 778 - 782  1997年

    DOI CiNii

  • 片状黒鉛鋳鉄の機械的性質に及ぼす黒鉛と基地の影響

    中江 秀雄, 辛 昊〓, 橋原 直樹

    鋳造工学   69 ( 7 ) 562 - 569  1997年

     概要を見る

    The microstructure of flake graphite cast iron is the most important factor in determining the mechanical properties. The microstructure consists of two principal parts : the graphite and the matrix. Therefore, the present paper discusses the influence of the matrix and graphite morphology on mechanical properties. Graphite morphology was varied based on inoculation and holding of the melt and the addition of Ti. The influence of matrix on the tensile properties of cast iron were investigated using kinds of heat treatments. The experimental results were as follows : (1) The influence of graphite morphology on tensile strength of cast iron can be explained by the Rule of Mixture. (2) In the case of the difference of elongation between A-type graphite samples and D-type graphite samples is more than 0.4%, we can use the Rule of Mixtures. But when the difference is less than 0.2%, can not be used the Rule.

    DOI CiNii

  • 凝固概論―共晶凝固の基礎

    第23回鉄鋼工学セミナーテキスト/日本鉄鋼協会     1 - 9  1997年

  • 機械工学辞典

    社団法人日本機械学会    1997年

  • Tensile Properties, of Pure Fe-C-Si Cast Iron

    Proceedings of The Fifth Asian Foundry Corgress     237 - 136  1997年

  • Interfacial Interaction in Al-Si-Al2O3

    Proceedings of the Fifth Asian Foundry Congress     408 - 417  1997年

  • Effect of Alloying Elements on Graphite and Cementite Eutectic Temperature of Cast Iron

    Proceedings of the Fifth Asian Foundry Congress     137 - 146  1997年

  • 脱亜鉛溶解システム

    上野 定洋, 中江 秀雄

    鋳造工学   69 ( 12 ) 1071 - 1074  1997年

    DOI CiNii

  • 帯溶融法を利用した粒子添加複合材料の一方向凝固

    呉 樹森, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   69 ( 1 ) 3 - 8  1997年

     概要を見る

    &nbsp;&nbsp;Unidirectional solidification experiments have been carried out in Al/Al2O3 composites by using the zone-melting process. The experimental results show as follows. When the volume fraction of Al2O3 particles is 5&sim;20vol %, particles can be distributed uniformly in the solidified samples. But particle settling still occurs in the liquid, and becomes severer as the particle volume fraction decreases. However, when the volume fraction of the particles is more than 20&sim;22 vol %, no further settling occurs under a solidification velocity of 8&sim;16 mm/h. The solidification rate has a very small effect on the settling height with the same particle contents. In order to investegate the interaction of solid/liquid interface and particles, a main solidification experiment was carried out using the samples made in the above mentioned experiment. The Al2O3 particles are pushed by the growing solid phase under a solidification velocity of 2mm/h. The particles are mechanically entrapped between cells, and distributed along the crystal grain boundaries.

    DOI CiNii

  • Infiltration and combustion synthesis of an intermenallic Compound Ni3 A1

    Materials Science and Engineering   A225   21 - 28  1997年

  • Behavior of Ceramic Particles at Solid/Liquid Interface during Solidification of Metal Matrix Composites

    Key Engineering Materials   127 ( 131 ) 503 - 510  1997年

  • Behavior of Ceramic Ponticles at S/L Interface during Solidification of MMC

    Key Eng.Materials Trans Tech pub     127 - 131  1997年

  • Reactive and nonreactive wettings

    Proc. 2nd H.T.C     2 - 3  1997年

  • Modification of Al-Si Alloy Using Strontium and its Mechanism

    Proceedings of the 4th Decennial International Conference on Solidification Processing. Sheffield   1997 ( July ) 477 - 480  1997年

  • Tensile Properties, of Pure Fe-C-Si Cast Iron

    Proceedings of The Fifth Asian Foundry Corgress     237 - 136  1997年

  • Interfacial Interaction in Al-Si-Al2O3

    Proceedings of the Fifth Asian Foundry Congress     408 - 417  1997年

  • Effect of Alloying Elements on Graphite and Cementite Eutectic Temperature of Cast Iron

    Proceedings of the Fifth Asian Foundry Congress     137 - 146  1997年

  • Solidification of undercooled Cu, Cu-O and Cu-S alloys

    M Yoshida, T Muramatsu, JF Hong, H Nakae

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   60 ( 11 ) 1095 - 1100  1996年11月

     概要を見る

    Undercooling and solidification phenomena of Cu and Cu-O and Cu-S alloys were investigated. The ''one-way nucleation'' of Cu/Cu2S eutectic was also examined. The undercooling of Cu-O and Cu-S alloys increased with increasing oxygen or sulfur content. This may be caused by oxidation or sulfurizing of effective nucleants in molten copper, or by the surfactant roll of oxygen and sulfur. Regarding the ''one-way nucleation'', the Cu phase nucleates the Cu2S phase at small undercooling, but the Cu2S phase does not nucleate Cu.

    DOI

  • Solidification of undercooled Cu, Cu-O and Cu-S alloys

    M Yoshida, T Muramatsu, JF Hong, H Nakae

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   60 ( 11 ) 1095 - 1100  1996年11月

     概要を見る

    Undercooling and solidification phenomena of Cu and Cu-O and Cu-S alloys were investigated. The ''one-way nucleation'' of Cu/Cu2S eutectic was also examined. The undercooling of Cu-O and Cu-S alloys increased with increasing oxygen or sulfur content. This may be caused by oxidation or sulfurizing of effective nucleants in molten copper, or by the surfactant roll of oxygen and sulfur. Regarding the ''one-way nucleation'', the Cu phase nucleates the Cu2S phase at small undercooling, but the Cu2S phase does not nucleate Cu.

    DOI

  • Equilibrium contact angle in the magnesium oxide aluminium system

    H Fujii, H Nakae

    ACTA MATERIALIA   44 ( 9 ) 3567 - 3573  1996年09月

     概要を見る

    The change in the contact angle between two kinds of MgO [sintered sample and single crystal (100) sample] and molten aluminium over time was measured at 1373 K. The atmosphere was a purified He-3vol%H-2 where the formation of the alumina is prevented, and the pressure of the atmosphere was 1.2 arm (1.2 x 10(5) Pa) to minimise the vaporisation of aluminium. Using a logarithmic time scale, three distinct wetting phases (I, II, III) were easily observed in both systems, as is typical in reactive systems. Phase IV (equilibrium-wetting phase), however, was not observed in the present systems even when the experiment was conducted over a long time. Instead, when investigating the change in interfacial area (interfacial diameter) with the change in contact angle, four detailed stages were observed in phase III (interfacial-reaction-wetting phase). These stages in phase III were caused by a decrease in the volume of the molten aluminium due to the interfacial reaction and the vaporisation of the drop. The progress through the stages represented a transition in contact angle from an advancing contact angle to a receding contact angle. In systems where the decrease in volume is too great, the equilibrium contact angle cannot be obtained directly. Here, a method is proposed for the estimation of the equilibrium contact angle in such a system. Copyright (C) 1996 Acta Metallurgica Inc.

    DOI CiNii

  • Wetting Phenomena and Burn-on of Iron Castings

    4th Asian Foundry Congress 32nd Annual Convention of Australian Foundry Institutel     765 - 771  1996年

  • Trend of Steel Scrap in Japan and Its Influence on Iron Foundry

    中江 秀雄, 管野 利猛, 川崎 通夫

    鋳造工学 = Journal of Japan Foundry Engineering Society   68 ( 4 ) 348 - 353  1996年

    DOI CiNii

  • Rod-Lamella Transition in Directionally Solidified Ni-W Eutectic Alloy

      50 ( 5 ) 482 - 489  1996年

    DOI

  • Modification Mechanism of Al-Si Eutectic Alloy

      68 ( 2 ) 148 - 155  1996年

    DOI

  • Microstructure of Directionally Solidified Ni-W Eutectic Alloy

      36 ( 2 ) 55 - 56  1996年

  • Influence of Graphite Morphology and Matrix on Mechanical Properties of Cast Iron

    62nd World Foundry Congress     1 - 11  1996年

  • Equilibrium Contact Angle in the Magnesium Oxide/Aluminium System

    FUJII H, NAKAE H

    Acta mater/Acta Metallurgica   44 ( 9 ) 3567 - 3573  1996年

    DOI CiNii

  • 鋳鉄鋳物の溶解

    日本鋳造工学会第55回関東支部講演会/日本鋳造工学会    1996年

  • 鋳鉄の凝固

    日本鋳物協会東海支部講演会/日本鋳造工学会    1996年

  • 鋳鉄の原材料としての鋼くずの動向

    中江 秀雄, 管野 利猛, 川崎 通夫

    鋳造工学/日本鋳造工学会   68 ( 4 ) 348 - 353  1996年

    DOI CiNii

  • 純銅・銅/酸素・銅/硫黄系合金の過冷凝固現象

    日本金属学会誌/日本金属学会   60 ( 11 )  1996年

    DOI

  • 一方向凝固したNi-W共晶合金の組織

    熱処理/日本熱処理技術協会   36 ( 2 )  1996年

  • Influence of Graphite Morphology and Matrix on Mechanical Properties of Cast Iron

    62nd World Foundry Congress   62  1996年

  • 一方向凝固したNi-W共晶合金におけるα相の形態遷移

    日本金属学会誌/日本金属学会   60 ( 5 )  1996年

    DOI

  • 固液界面エネルギーと濡れ

    軽金属/軽金属学会   46 ( 10 )  1996年

  • Wetting Phenomena and Burn-on of Iron Castings

    4th Asian Foundry Congress Australian Foundry Institute    1996年

  • Wetting Phenomena and Burn-on of Iron Castings

    4th Asian Foundry Congress 32nd Annual Convention of Australian Foundry Institutel     765 - 771  1996年

  • 鋳鉄の原材料としての鋼くずの動向

    中江 秀雄, 管野 利猛, 川崎 通夫

    鋳造工学 = Journal of Japan Foundry Engineering Society   68 ( 4 ) 348 - 353  1996年

    DOI CiNii

  • Rod-Lamella Transition in Directionally Solidified Ni-W Eutectic Alloy

      50 ( 5 ) 482 - 489  1996年

    DOI

  • Al-Si共晶合金における共晶Siの微細化機構

    宋 基敬, 中江 秀雄

    鋳造工学 = Journal of Japan Foundry Engineering Society   68 ( 2 ) 148 - 155  1996年

    DOI CiNii

  • Microstructure of Directionally Solidified Ni-W Eutectic Alloy

      36 ( 2 ) 55 - 56  1996年

  • Influence of Graphite Morphology and Matrix on Mechanical Properties of Cast Iron

    62nd World Foundry Congress     1 - 11  1996年

  • Equilibrium Contact Angle in the Magnesium Oxide/Aluminium System

    Acta mater/Acta Metallurgica   44 ( 9 ) 3567 - 3573  1996年

    DOI CiNii

  • Equilibrium Contact Angle in the Magnesium Oxide/Aluminium System

    Acta mater   44 ( 9 ) 3567 - 3573  1996年

    DOI CiNii

  • Influence of Graphite Morphology and Matrix on Mechanical Properties of Cast Iron

    62nd World Foundry Congress   62  1996年

  • Wetting Phenomena and Burn-on of Iron Castings

    4th Asian Foundry Congress Australian Foundry Institute    1996年

  • INFLUENCE OF MELTING TEMPERATURE ON MORPHOLOGY OF PRIMARY MULLITE IN SIO2-AL2O3 SYSTEM

    H NAKAE, S NAKANO, M YOSHIDA

    MATERIALS TRANSACTIONS JIM   36 ( 9 ) 1163 - 1169  1995年09月

     概要を見る

    A series of melting and solidification experiments were carried out using high-purity SiO2 and Al2O3 powders as the starting materials. The effect of melting temperature on the morphology of the primary mullite was investigated. The following conclusions were made:
    1) The morphology of the primary mullite went through five stages as the melting temperature increased; massive, fibrous, faceted dendritic, feathery and fine feathery structures. These phenomena can be explained based on the number of effective nuclei in the melt.
    2) The fibrous mullite grew from mullite precursors formed in the melt. Under highly supercooled conditions, the fibrous morphology becomes unstable and begins to branch and form a faceted dendritic crystal.
    3) When the number of nuclei is extremely small, the mullite nucleated on the rhombic dodecahedron Mo originating from the molybdenum crucible and crystallizes out into a feathered structure.

    DOI

  • INFLUENCE OF MELTING TEMPERATURE ON MORPHOLOGY OF PRIMARY MULLITE IN SIO2-AL2O3 SYSTEM

    H NAKAE, S NAKANO, M YOSHIDA

    MATERIALS TRANSACTIONS JIM   36 ( 9 ) 1163 - 1169  1995年09月

     概要を見る

    A series of melting and solidification experiments were carried out using high-purity SiO2 and Al2O3 powders as the starting materials. The effect of melting temperature on the morphology of the primary mullite was investigated. The following conclusions were made:
    1) The morphology of the primary mullite went through five stages as the melting temperature increased; massive, fibrous, faceted dendritic, feathery and fine feathery structures. These phenomena can be explained based on the number of effective nuclei in the melt.
    2) The fibrous mullite grew from mullite precursors formed in the melt. Under highly supercooled conditions, the fibrous morphology becomes unstable and begins to branch and form a faceted dendritic crystal.
    3) When the number of nuclei is extremely small, the mullite nucleated on the rhombic dodecahedron Mo originating from the molybdenum crucible and crystallizes out into a feathered structure.

    DOI

  • ROD-LAMELLA TRANSITION IN DIRECTIONALLY SOLIDIFIED NI-W EUTECTIC ALLOY

    M YOSHIDA, T TSUJIMURA, M KAMATA, H NAKAE

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   59 ( 6 ) 653 - 659  1995年06月

     概要を見る

    The morphological transition of rods to lamellae with increasing growth rate in a Ni-W eutectic alloy was investigated. The eutectic alloy was directionally solidified in a Bridgman-type apparatus at the eight steps of growth rates from 1.0 to 16 mm/h.
    The change in morphology with increasing growth rate appeared in the following two different ways of lamella formation:
    (1) Under the conditon of the planar solid/liquid interface, the eutectic grain was uniformly comprised of rods or lamellae (blades). In this case, the deviation of the gamma-phase [100] direction from the growth direction controlled the morphology.
    (2) When cellular interface was formed at relatively higher growth rates, both rods and radial lamellae coexist simultaneously in a cell.
    We confirmed that, as a common factor in the above two ways, the driving force of lamellae formation should be influenced by the angle between the gamma-phase [100] direction and the local growth direction defined as being perpendicular to the solid/liquid interface.

    DOI

  • ROD-LAMELLA TRANSITION IN DIRECTIONALLY SOLIDIFIED NI-W EUTECTIC ALLOY

    M YOSHIDA, T TSUJIMURA, M KAMATA, H NAKAE

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   59 ( 6 ) 653 - 659  1995年06月

     概要を見る

    The morphological transition of rods to lamellae with increasing growth rate in a Ni-W eutectic alloy was investigated. The eutectic alloy was directionally solidified in a Bridgman-type apparatus at the eight steps of growth rates from 1.0 to 16 mm/h.
    The change in morphology with increasing growth rate appeared in the following two different ways of lamella formation:
    (1) Under the conditon of the planar solid/liquid interface, the eutectic grain was uniformly comprised of rods or lamellae (blades). In this case, the deviation of the gamma-phase [100] direction from the growth direction controlled the morphology.
    (2) When cellular interface was formed at relatively higher growth rates, both rods and radial lamellae coexist simultaneously in a cell.
    We confirmed that, as a common factor in the above two ways, the driving force of lamellae formation should be influenced by the angle between the gamma-phase [100] direction and the local growth direction defined as being perpendicular to the solid/liquid interface.

    DOI

  • 片状黒鉛鋳鉄の強度特性に及ぼす黒鉛形態の影響

    鋳物/日本鋳物協会   67 ( 11 )  1995年

    DOI

  • 鋳物の凝固

    鋳物/日本鋳物協会   67 ( 4 )  1995年

  • 図解鋳造用語辞典

    日本鋳造工学会    1995年

  • 一方向凝固したFi-W共晶合金におけるα相の凝固速度による形態遷移現象

    日本金属学会誌/日本金属学会   59 ( 6 )  1995年

    DOI

  • セラミックスと溶融Alの濡れを正確に測定する

    藤井 英俊, 中江 秀雄

    まてりあ/日本金属学会   34 ( 11 ) 1269 - 1275  1995年

    DOI CiNii

  • Wear-Resistance of Manganes Steel Sugace Composites with Cast Tungsten Carbide Paritioles

      67 ( 4 ) 271 - 276  1995年

    DOI

  • WC-W2C粒子により表面複合化したマンガン鋼の耐摩耗性

    鋳物/日本鋳物協会   67 ( 4 )  1995年

    DOI

  • Solidification of Cast Iron

    中江 秀雄

    鋳物   67 ( 4 ) 283 - 289  1995年

    DOI CiNii

  • Precise Measurement of the Wetting Ceremics

    藤井英俊, 中江秀雄

    Materia Japan   34 ( 11 ) 1269 - 1275  1995年

    DOI

  • Inpluence of Graphite Morphology on Mechamical Properties of Cast Iron

      67 ( 11 ) 782 - 787  1995年

    DOI

  • Influence of Melting Temperature on Morphology of Primary Mullite in SiO2-Al2O3 System

    Materials Trasactions, JIM   36 ( 9 )  1995年

    DOI

  • Influence of Calcium on Modification of Al-Si-Sr Alloys

    Proc. of the 3rd Asian Foundry Congress/The Korean Foundrymen's Society    1995年

  • Influence of Calcium on Modeffication of Al-Si-Sr Alloys

    Proc.of the 3rd Asian Foundry Congress The Korean Faundrymen's Society     94 - 99  1995年

  • Effect of gravity on contact angle

    FUJII H, NAKAE H

    Philosophical Magazine A   72 ( 6 ) 1505 - 1512  1995年

    DOI

  • Effect of Gravity on Contact Angel

    Philosophical Magazine A   72 ( 6 )  1995年

    DOI

  • Detailed Wetting Phases in the MgO/Al System

    Proc. of HTC    1995年

  • Detailed Wetting Phases in the MgO/Al system

    Proc. Int. Conf. High Temperature Capillarity    1995年

  • Control Factors in Determining Microstructure of Directionally Solidified NI-W Eutectic Composite

    Cast Composite '95 Zakopane,Poland     51 - 54  1995年

  • Control Factors in Determining Microstracture of Directionally Solidified Nl-W Eutectic Composite

    Cast Composites '95    1995年

  • Al-Si共晶合金における共晶Siの微細化機構

    宋 基敬, 中江 秀雄

    日本鋳造工学/日本鋳造工学会   68 ( 2 ) 148 - 155  1995年

    DOI CiNii

  • A New Method of Fabricationg Intermetallic Compounds by Utilizing Interfacial Reactions

    Proc. Int. Conf. High Temperature Capillarity    1995年

  • A New Method of Fabricating Intermetallic Compounds by Utilizing Interfatial Reactions

    Proc. of HTC    1995年

  • 濡れに及ぼす表面粗さの影響

    日本金属学会春季大会/日本金属学会    1995年

  • 一方向凝固したNi-W共晶合金のα相晶出形態に及ぼす凝固速度因子の影響

    日本金属学会春季大会/日本金属学会    1995年

  • 一方向凝固させたAl-Si合金のSiの形態に及ぼすCaの影響

    日本金属学会春季大会/日本金属学会    1995年

  • 鋳鉄の焼付きと濡れ

    日本鋳物協会第126回全国大会/日本鋳物協会    1995年

  • 総論;亜鉛,鉛の混入源とその除去機構

    技術講習会    1995年

  • 3カップ熱分析によるチル化傾向および黒鉛形状の炉前判定

    日本鋳物協会第126回全国大会/日本鋳物協会    1995年

  • 濡れと接合

    軽金属協会界面制御セミナー/軽金属協会    1995年

  • 溶鉄の焼付きと濡れ

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • 銅における有効不均質凝固核について

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • 黒鉛とFe-C合金の濡れに及ぼすSの影響

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • 一方向凝固させたアルミニウム溶湯中のAl2O3粒子の沈降および分布

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • セラミックス粒子の凝固界面における挙動

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • Cu-B合金を使用した球状黒鉛鋳鉄における球状化理論のモデル実験

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • Control Factors Determoning Microstructure of Directionally Solidified Nl-W Eutectic Composite

    Cast Composites '95    1995年

  • 3カップ熱分析による鋳鉄の機械的性質の推測

    日本鋳物協会第127回全国講演大会/日本鋳物協会    1995年

  • Influence of Calcium on Modification of Al-Si-Sr Alloys

    The 3rd Asian Foundry Congress/Asian Foundry Congress    1995年

  • Surface Tension of Sn-Pb System

    The 117th Meeting of JIM    1995年

  • Effect of Surface Roughness on Wettability

    The 117th Meeting of JIM    1995年

  • Wear-Resistance of Manganes Steel Sugace Composites with Cast Tungsten Carbide Paritioles

      67 ( 4 ) 271 - 276  1995年

    DOI

  • Solidification of Cast Iron

      67 ( 4 ) 283 - 289  1995年

    DOI

  • Precise Measurement of the Wetting Ceremics

    Materia Japan   34 ( 11 ) 1269 - 1275  1995年

    DOI

  • Inpluence of Graphite Morphology on Mechamical Properties of Cast Iron

      67 ( 11 ) 782 - 787  1995年

    DOI

  • Influence of Melting Temperature on Morphology of Primary Mullite in SiO2-Al2O3 System

    Materials Trasactions, JIM   36 ( 9 )  1995年

    DOI

  • Influence of Calcium on Modification of Al-Si-Sr Alloys

    Proc. of the 3rd Asian Foundry Congress/The Korean Foundrymen's Society    1995年

  • Influence of Calcium on Modeffication of Al-Si-Sr Alloys

    Proc.of the 3rd Asian Foundry Congress The Korean Faundrymen's Society     94 - 99  1995年

  • Effect of gravity on contact angle

    Hidetoshi Fujii, Hideo Nakae

    Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties   72 ( 6 ) 1505 - 1512  1995年

     概要を見る

    The effect of gravity on the contact angle was calculated using a precise drop shape model. The drop shape, whose surface curvatures change under the influence of gravity, was calculated following Laplace's equation. The total free energy of the three interfacial free energies and the potential energy of the drop were calculated
    the contact angle where the total free energy is minimal at each drop weight was defined as the equilibrium contact angle. These calculations indicate that gravity has no effect on the equilibrium contact angle. © 1995 Taylor &amp
    Francis Group, LLC.

    DOI

  • Effect of Gravity on Contact Angel

    Philosophical Magazine A   72 ( 6 )  1995年

    DOI

  • Detailed Wetting Phases in the MgO/Al System

    Proc. of HTC    1995年

  • Detailed Wetting Phases in the MgO/Al system

    Proc. Int. Conf. High Temperature Capillarity    1995年

  • Control Factors in Determining Microstructure of Directionally Solidified NI-W Eutectic Composite

    Cast Composite '95 Zakopane,Poland     51 - 54  1995年

  • Control Factors in Determining Microstracture of Directionally Solidified Nl-W Eutectic Composite

    Cast Composites '95    1995年

  • A New Method of Fabricationg Intermetallic Compounds by Utilizing Interfacial Reactions

    Proc. Int. Conf. High Temperature Capillarity    1995年

  • A New Method of Fabricating Intermetallic Compounds by Utilizing Interfatial Reactions

    Proc. of HTC    1995年

  • Control Factors Determoning Microstructure of Directionally Solidified Nl-W Eutectic Composite

    Cast Composites '95    1995年

  • Influence of Calcium on Modification of Al-Si-Sr Alloys

    The 3rd Asian Foundry Congress/Asian Foundry Congress    1995年

  • Surface Tension of Sn-Pb System

    The 117th Meeting of JIM    1995年

  • Effect of Surface Roughness on Wettability

    The 117th Meeting of JIM    1995年

  • Wetting of Ceramics by Malten Metals

    M. R. S. Japan    1994年

  • Interfacial reaction between molten Al and sintered Ni for fabrication of intermetalic Compound

    Proc. of PM'94 Secondary Operation   PM'94/,  1994年

  • Influence of Lead and Calcium on Graphite Morphology in Cast Iron

    Proc. of the 2nd. Asian Foundry Cong.   2  1994年

  • Wetting of Ceramics by Malten Metals

    M. R. S. Japan    1994年

  • Interfacial reaction between molten Al and sintered Ni for fabrication of intermetalic Compound

    Proc. of PM'94 Secondary Operation   PM'94/,  1994年

  • Influence of Lead and Calcium on Graphite Morphology in Cast Iron

    Proc. of the 2nd. Asian Foundry Cong.   2  1994年

  • Theoretical Model of Transfer of Particle into Molten Metal

    ICCM Proc. ICCM/9    1993年

  • Role of Ca for Inoculation of Cast Iron

    CIATF Proc 60-WFC   60 ( 24 )  1993年

  • Interfacial Reaction Wetting in the Boron Nitride/Molten Aluminum System

    Pergamon Press Acta Met. Mat   Oct ( 41 )  1993年

    DOI

  • Four Wetting Phases in AIN/Al and AIN Composites /Al Systems, Models of Non reactive, Reactive, and Composites Systems

    AIME Met. Trans-A 24A    1993年

    DOI

  • Effect of Sr on the modification of Al-Si

    TMS ibid.    1993年

  • Effect of Al addition the structure of directionally solidifield Ni-W eutectic composites

    TMS Proc. 1st Processing Mat. for Properties    1993年

  • Theoretical Model of Transfer of Particle into Molten Metal

    ICCM Proc. ICCM/9    1993年

  • Role of Ca for Inoculation of Cast Iron

    CIATF Proc 60-WFC   60 ( 24 )  1993年

  • Interfacial Reaction Wetting in the Boron Nitride/Molten Aluminum System

    Pergamon Press Acta Met. Mat   Oct ( 41 )  1993年

    DOI

  • Four Wetting Phases in AIN/Al and AIN Composites /Al Systems, Models of Non reactive, Reactive, and Composites Systems

    AIME Met. Trans-A 24A    1993年

    DOI

  • Effect of Sr on the modification of Al-Si

    TMS ibid.    1993年

  • Effect of Al addition the structure of directionally solidifield Ni-W eutectic composites

    TMS Proc. 1st Processing Mat. for Properties    1993年

  • Reactive Wetting of Ceramics by Liquid Metals

    Mater Trans. J. L. M   Apr ( 33 )  1992年

    DOI

  • Reactive Wetting of Ceramics by Liquid Metals

    Mater Trans. J. L. M   Apr ( 33 )  1992年

    DOI

  • Measurement of Wetting of Graphite by Al and Al-Si Alloys using Meniscography

    Mater. Trans. J. I. M   Jun ( 31 )  1991年

    DOI

  • Four Wetting Phases in Al N/Al and Al N+C/Al System

    Proc. ICCM-8   8  1991年

  • Measurement of Wetting of Graphite by Al and Al-Si Alloys using Meniscography

    Mater. Trans. J. I. M   Jun ( 31 )  1991年

    DOI

  • Four Wetting Phases in Al N/Al and Al N+C/Al System

    Proc. ICCM-8   8  1991年

  • Solidification of spheroidal graphite cast iron -Nucleation and Growth-

      74 ( 3 ) 197 - 204

  • Solidification of spheroidal graphite cast iron -Nucleation and Growth-

      74 ( 3 ) 197 - 204

▼全件表示

Works(作品等)

  • 発明奨励賞 平成5年度 関東地方発明表彰

受賞

  • 日本鋳造工学会 論文賞

    2003年  

  • 日本鋳造工学会論文賞

    2001年  

  • 日本金属学会論文賞

    1999年  

  • 日本鉄鋼協会 三島賞

    1998年  

  • 日本金属学会論文賞

    1995年  

  • 日本鋳物協会・論文賞

    1992年  

  • 日本鋳物協会小林賞

  • 日本鋳物協会豊田賞

▼全件表示

共同研究・競争的資金等の研究課題

  • 凝固機構

  • 鋳鉄

  • 鋳造複合材料

  • 界面反応によるNi3Al金属間化合物のIn Situ製造・成型法に関する研究

  • 鋳造法による金属基複合材料の製造法

  • 溶融Al合金と各種セラミックスとの濡れと界面反応

  • Fabrication of Metal Matrix Composites using Casting Technology

  • Wetting phenomena and Interfacial reaction between molten Al and ceramics

▼全件表示

 

委員歴

  • 2003年
    -
    2005年

    日本金属学会  理事

  • 2002年
    -
    2004年

    日本鋳造工学会  会長

  • 1997年
    -
    1999年

    軽金属学会  編集幹事・理事

  • 1998年
    -
     

    日本鋳造工学会  副会長

  • 1996年
    -
    1998年

    日本鉄鋼協会  理事

  • 1994年
    -
     

    日本鋳造工学会  関東支部長

  • 1994年
    -
     

    日本鋳物協会  理事 編集委員長

▼全件表示