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Mg-Zn-Si體系的相平衡計算及應(yīng)用
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國家科技支撐計劃(2007BAE09B03)；貴州省“十一五”重大專項(xiàng)(20066003)；中國鋁業(yè)公司科技發(fā)展基金(2007KJA07)


Thermodynamic Calculation of Phase Equilibria in the Mg-Zn-Si System and Its Application
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    摘要:

    利用Calphad方法重新評估了Mg-Si二元系的液相，并結(jié)合Mg-Zn和Zn-Si二元系熱力學(xué)數(shù)據(jù)，外推得到Mg-Zn-Si三元系熱力學(xué)參數(shù)；同時根據(jù)Mg2Si-MgZn2偽二元相圖實(shí)驗(yàn)數(shù)據(jù)評估了Mg-Zn-Si系的液相三元相交互作用參數(shù)，計算相圖與實(shí)驗(yàn)數(shù)據(jù)較一致。利用Scheil凝固模型模擬了Mg-2.33Zn-0.9Si(at%)合金的凝固過程，預(yù)測了鎂合金在鑄造冷卻過程中的相演變信息，模擬計算結(jié)果與實(shí)驗(yàn)結(jié)果吻合較好

    Abstract:

    The liquid phase of the Mg-Si binary system was re-assessed by the Calphad approach. Combined the thermodynamic data of Mg-Zn and Zn-Si binary systems, the thermodynamic parameters of Mg-Zn-Si ternary system were obtained by extrapolation. Based on the phase diagram of Mg2Si-MgZn2 pseudo-binary system, the liquid ternary interaction parameters of Mg-Zn-Si system were assessed. The results show that the calculated phase diagram agrees basically with the experimental data. The solidification process of the Mg-2.33Zn-0.9Si (at%) alloy was simulated by Scheil model, and the phase evolution of Mg alloy during cooling casting was predicted. The results agree with the previous experiment results

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趙陽子,趙云鶴,李 謙,陳雙林,張捷宇,周國治. Mg-Zn-Si體系的相平衡計算及應(yīng)用[J].稀有金屬材料與工程,2010,39(8):1385~1389.[Zhao Yangzi, Zhao Yunhe, Li Qian, Chen Shuanglin, Zhang Jieyu, Zhou Guozhi. Thermodynamic Calculation of Phase Equilibria in the Mg-Zn-Si System and Its Application[J]. Rare Metal Materials and Engineering,2010,39(8):1385~1389.]
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  • 收稿日期:2009-08-27
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