| A Theoretical Model on Solvus Line Prediction of Film and Its Application in Nanogranular Al-Cu System |
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| 作者姓名： | 徐山清 孟庆平 戎咏华 徐祖耀 |
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| 作者单位： | School of Materials Science and Eng. Shanghai Jiaotong Univ.，School of Materials Science and Eng. Shanghai Jiaotong Univ.，School of Materials Science and Eng. Shanghai Jiaotong Univ.，School of Materials Science and Eng. Shanghai Jiaotong Univ.，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China |
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| 基金项目： | 国家自然科学基金;上海市科技研究基金 |
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| 摘 要： | A theoretical model on the solvus line prediction of a film was proposed and applied to a nanogranular Al-Cu system. The calculation results show that the solvus line of solute Cu will markedly lower with the decrease of grain size, namely, the starting temperature of θ(Al_2Cu) precipitation in a nanogranular Al-Cu film will markedly lower than that of conventional coarse grain alloy with the same Cu concentration, and the precipitation temperatures calculated are comparable with the experimental ones. The theoretical model can be simply used to calculate the starting temperature of precipitation in Al-Cu films under three states: ① films with substrate; ② films without substrate; ③ ultrafine grain bulk alloy. As a result, the model is universal, moreover, can be, in principle, used to predict precipitation temperature in other systems.
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| 关 键 词： | 金属热力学 理论模型 溶解度 Al-Cu体系 |
A Theoretical Model on Solvus Line Prediction of Film and Its Application in Nanogranular Al-Cu System |
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| XU Shan-qing,MENG Qing-ping,RONG Yong-hua,T. Y. Hsu.A Theoretical Model on Solvus Line Prediction of Film and Its Application in Nanogranular Al-Cu System[J].Journal of Shanghai Jiaotong university,2007,12(3):341-346. |
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| Authors: | XU Shan-qing MENG Qing-ping RONG Yong-hua T Y Hsu |
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| Institution: | School of Materials Science and Eng. , Shanghai Jiaotong Univ. , Shanghai 200030, China |
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| Abstract: | A theoretical model on the solvus line prediction of a film was proposed and applied to a nanogranular Al-Cu system. The calculation results show that the solvus line of solute Cu will markedly lower with the decrease of grain size, namely, the starting temperature of θ (Al2Cu) precipitation in a nanogranular Al-Cu film will markedly lower than that of conventional coarse grain alloy with the same Cu concentration, and the precipitation temperatures calculated are comparable with the experimental ones. The theoretical model can be simply used to principle, used to predict precipitation temperature in other systems. |
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| Keywords: | theoretical model nanogranular films Al-Cu system solubility precipitation |
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