| Project/Area Number |
61420039
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属加工(含鋳造)
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
SHINGU Hideo Kyoto Unov. Fac.Eng. Professor, 工学部, 教授 (20026024)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIHARA Keiichi Kyoto Univ. Fac.Eng.Assistant, 工学部, 助手 (30184550)
KOBAYASHI Kojior Kyoto Univ. Fac.Eng.Assoc.Prof., 工学部, 助教授 (70026277)
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| Project Period (FY) |
1986 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥31,000,000 (Direct Cost: ¥31,000,000)
Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1988: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1987: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1986: ¥25,400,000 (Direct Cost: ¥25,400,000)
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| Keywords | non-equilibrium / meta-stable / mechanical alloying / solid state alloying / amorphous / super-saturated solution / 過飽和固溶体 / プラズマ / 準安定相 / 急冷 / メカニカル・アロイング / 準結晶 / スパッタリング / 薄膜 / Al合金 |
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| Research Abstract |
The study of the non-equilibrium alloy phases has been carried out throughout the course of this project. The method utilized in this project were rapid quenching of melts, sputtering, and mechanical alloying. These methods covers the processes of non-equilibrium phases through liquid, gaseous and solid state reaction. In summary, in all of these apparently different approach to the formation of non--equilibrium alloy phases, the tendency for the formation of non--equilibrium state can generally be predictable on the bases of thermodynamic evaluation of combination of elements to be alloyed. In other words, the relative value of Gibbs' free energy of relevant equilibrium and non-equilibrium phases is the key factor for the prediction of the appearance and disappearance of the desired phase. The values of relative free energy of phases naturally is best expressed by the type and shape of the equilibrium phase diagrams. Hence the most important factor to be considered in the synthesis of non-equilibrium phases was shown to exist in the detailed assessment of the published thermodynamic data which enable to draw not only equilibrium but also nonequilibrium phase boundaries of alloy systems to be studied.
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