Solidus curve of the Al–Cu alloy system under pressure

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• 作者：Kagaya ; H.-M. ; Suzuki ; T. ; Takaya ; M.-S. ; Soma ; T.
• 关键词：A. Metals ; D. Anharmonicity ; D. Phase transitions ; D. Phonons ; D. Thermodynamic properties
• 刊名：Solid State Communications
• 出版年：2000
• 期刊代码：101_00381098
• 类别：ms
• 出版时间：July 21, 2000
• 卷：115
• 期：9
• 页码：483-487
• 文件大小：127 K

摘要

The mean-square displacement of thermal vibrations and melting for the Al and Al–Cu alloy system are studied using our previous treatment based on microscopic electronic theory. The temperature- and concentration-dependent mean-square displacement for Al_1−xCu_x system decreases under pressure. The Debye temperature obtained at low temperatures for Al_1−xCu_x solid solution decreases as a function of the Cu atomic fraction x, but increases at higher temperatures. The effect of pressure on the solidus curve is discussed by applying Lindeman's melting law to the alloy system, and the phase diagram of Al–Cu alloy system under pressure is predicted theoretically.