Effect of Ce/La microalloying on microstructural evolution of Mg-Zn-Ca alloy during solution treatment

被引：0
|
作者：
张庆鑫 [1 ,2 ]
佟立波 [1 ]
程丽任 [1 ]
江中浩 [2 ]
孟健 [1 ]
张洪杰 [1 ]
机构：
[1] State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
[2] Key Lab of Automobile Materials, College of Materials Science and Engineering, Jilin University
来源：
Journal of Rare Earths | 2015年 / 33卷 / 01期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Mg-Zn-Ca alloy; Ce/La; solution treatment; MgxZny-Ca-(Ce/La) phase; rare earths;
D O I：
暂无
中图分类号：
TG146.22 []; TG146.45 []; TG156.94 [固溶处理、脱溶处理];
学科分类号：
080201 ; 080502 ; 080503 ;
摘要：
The effect of Ce/La misch metal addition on the microstructural evolution of as-cast and as-soluted Mg-5.3Zn-0.5Ca(wt.%) alloys was systematically investigated. It was found that Ce/La could effectively refine the as-cast alloy and restrain grain growth during solution treatment, which was derived from the constitutional supercooling during solidification process and the formation of stable intermetallic compounds Ce Mg12 and Mg17La2. Furthermore, Ce/La microalloying and solution treatment resulted in an evolution from the original lamellar Ca2Mg6Zn3/α-Mg to the divorced eutectic structure. The thermal stability of Mg-Zn-Ca alloy could be effectively improved by Ce/La addition, because the low-melting-point binary Mg-Zn phase was transformed to Mg x Zn y-Ca-(Ce/La) phase with higher thermal stability and the amount of Ca2Mg6Zn3/α-Mg eutectic structure was reduced.
引用
收藏
页码：70 / 76
页数：7
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