The phase stability and elastic properties of MgZn2 and Mg4Zn7 in Mg–Zn alloys
The phase stability and elastic properties of MgZn2 and Mg4Zn7 in Mg–Zn alloys
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DOI：
10.1016/j.scriptamat.2012.11.034
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发表时间：
2013-04
影响因子：
6
通讯作者：
Yaoping Xie;Zhi-Yong Wang;Z. Hou
中科院分区：
文献类型：
--
作者：
Yaoping Xie;Zhi-Yong Wang;Z. Hou
为了了解Mg-Zn合金中的析出相，我们利用第一性原理计算研究了Laves MgZn 2和单斜Mg 4 Zn 7的稳定性和弹性性质.结果表明，MgZn 2和Mg 4 Zn 7相的相对稳定性与其成分有关，这意味着β1′相中可能存在MgZn 2和Mg 4 Zn 7中的一种或两种。弹性模量测试结果表明，MgZn 2和Mg 4 Zn 7合金的应变电阻远大于Mg合金。
To understand the precipitates in Mg–Zn alloys, we perform first-principles calculations to investigate the stability and elastic properties of Laves MgZn2and monoclinic Mg4Zn7. We find that the relative stability of MgZn2and Mg4Zn7is dependent on their compositions, implying that either one or both of the phases can exist within β1′precipitates. The elastic moduli indicate that the strain resistance of MgZn2and Mg4Zn7is much greater than that of Mg.