Calculation of glass forming ranges in Al-Ni-RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model
Calculation of glass forming ranges in Al-Ni-RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model
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DOI：
10.1016/j.jallcom.2010.07.011
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发表时间：
2010-09-10
影响因子：
6.2
通讯作者：
Jiang, Y.
中科院分区：
文献类型：
--
作者：
Sun, S. P.;Yi, D. Q.;Jiang, Y.
系统地介绍了一种基于Miedema和Toop半经验模型计算三元合金系非晶形成范围的方法。该方法在处理三元合金系时考虑了热力学不对称组分的影响，因而比传统模型具有上级优势。用该方法成功地预测了Al-Ni-RE（Ce，La，Y）系及其亚二元系的玻璃形成范围。计算了Al-Ni-RE（Ce，La，Y）系统的混合焓和失配熵，并讨论了它们对非晶形成能力的影响。Al-Ni-Ce、Al-Ni-La和Al-Ni-Y的非晶形成能力相近。计算的玻璃形成范围与实验结果吻合较好。同时，计算了非晶相到固溶体在非晶形成区的焓变，结果表明，接近Ni-RE亚二元系的合金具有较高的非晶形成能力。(C)2010 Elsevier B. V.保留所有权利。
A method based on the semi-empirical Miedema's and Toop's model for calculating the glass forming range of a ternary alloy system was systematically described. The method is superior to conventional models by considering the effect of the thermodynamic asymmetric component when dealing with a ternary alloy system. Using this method, the glass forming ranges of Al-Ni-RE (Ce, La, Y) systems and their sub-binaries were successfully predicted. The mixing enthalpy and mismatch entropy were calculated, and their effects on the glass forming abilities of Al-Ni-RE (Ce, La, Y) systems were also discussed. The glass forming abilities of Al-Ni-Ce, Al-Ni-La and Al-Ni-Y are found to be close. The calculated glass forming ranges agree with experiments well. Meanwhile, the enthalpy change from amorphous phase to solid solution in the glass forming ranges was calculated, and the results suggest that those alloys close to the Ni-RE sub-binary system have higher glass forming abilities. (C) 2010 Elsevier B.V. All rights reserved.