| Project/Area Number |
07455258
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
OSAMURA Kozo Kyoto University, Materials Science and Engineering, Professor, 工学研究科, 教授 (50026209)
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| Co-Investigator(Kenkyū-buntansha) |
OKUDA Hiroshi Kyoto University, Materials Science and Engineering, Instructor, 工学研究科, 助手 (50214060)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1996: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1995: ¥6,000,000 (Direct Cost: ¥6,000,000)
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| Keywords | phase separation / phase transformation / materials science / small angle scattering / nonlinearity / Al-Zn alloy / Al-Lialloy / scaling |
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| Research Abstract |
Phenomenon of phase separation, which is one of diffusional phase transformations, is a basic knowledge in materials science and includes still unsolved problems. In the present study, the nonlinear pattern formation has been mainly investigated during the intermediate stage of phase separation. In 1995, both neutron and X-ray small angle scattering measurements were carried out to obtain the structure factor for Al-Zn, Al-Li and Fe based alloys. The mechanism of nonlinear phase separation has been elucidated by comparing the experimental data with the Langer's nonlinear theory. In 1996, In order to apply our consideration to the industrial materials, the driving force and phase relation were made clear in Al-Zn-Mg and Fe-Cr-Mo alloys by using the computer soft "Thermo Calc". Kinetics of phase separation were analyzed by applying time scaling as well as structure scaling to the change of structure factors.
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