Study on the solid solubility extension of Mo in Cu by mechanical alloying Cu with amorphous Cr(Mo)
Study on the solid solubility extension of Mo in Cu by mechanical alloying Cu with amorphous Cr(Mo)
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DOI：
10.1016/j.actamat.2008.08.013
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发表时间：
2008-12
期刊：
影响因子：
9.4
通讯作者：
S. Xi;Kesheng Zuo;Xiaogang Li;G. Ran;Jing-en Zhou
中科院分区：
文献类型：
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作者：
S. Xi;Kesheng Zuo;Xiaogang Li;G. Ran;Jing-en Zhou
本文介绍了用机械合金化技术扩大钼在铜中的固溶度。两个二元体系，Cu-10 wt.% Mo和Cr-50重量% Mo和一个三元体系，Cu-20 wt.% Cr（Mo）的影响。Mo在Cu中的固溶度小于4.3at当Cu-Mo系机械合金化时，而当Cr-Mo系机械合金化时，所有的Mo都溶解到Cr中，形成无定形Cr（Mo）。类似地，所有的10重量%当Cu ~ 20 wt.%时，Mo固溶于Cu中非晶Cr（Mo）机械合金化。基于Miedema模型，计算了这三种合金体系在固溶体形成过程中的吉布斯自由能变化均为正值，表明这三种合金体系在固溶体状态下的形成存在热力学势垒。讨论了这些机械合金化体系中固溶度扩展的机理。结果表明，在Cu-Mo系中加入第三种元素Cr有利于固溶度的扩展。
This paper presents the extension of the solid solubility of Mo in Cu by a mechanical alloying technique. Two binary systems, Cu–10wt.% Mo and Cr–50wt.% Mo, and one ternary system, Cu–20wt.% Cr(Mo), are investigated. The solid solubility of Mo in Cu has been shown to be less than 4.3at.% when the Cu–Mo system is mechanically alloyed, whereas when the Cr–Mo system is mechanically alloyed all of Mo dissolves into Cr, forming an amorphous Cr(Mo). Similarly, all of 10wt.% Mo dissolve into Cu when Cu–20wt.% amorphous Cr(Mo) is mechanically alloyed. Based on Miedema’s model, the Gibbs free-energy changes in these three alloy systems during the formation of solid solutions are calculated to be positive, which means that thermodynamic barriers exist for the formation of these three alloy systems in solid solution states. The mechanism of solid solubility extension in these mechanical alloyed systems is discussed. The conclusion is that the extension of solid solubility is favoured by adding a third element, such as Cr, to the Cu–Mo system.