M.L. Huang
,
H.X. Li
,
H. Ding
,
Y.P.Ren
,
S.M. Hao
金属学报(英文版)
Alloys of Mg-Zn-La system in Mg rich corner at 350℃ have been prepared in this study. Scanning electron microscopy (SEM), electron probe microanalysis with energy dispersive X-ray spectroscopy (EPMA-EDS), and X-ray diffraction (XRD) have been used to identify the phase equilibrium and the composition of each phase in the alloys. As a result, the isothermal section of Mg-Zn-La system in Mg rich corner at 350℃ has been determined. The result shows that, in addition to some binary phases, there exists a linear ternary compound called T-phase in Mg-Zn-La system at 350℃, in which the La content is about 8 at. pct ±0.4at.pct and the Zn content is 8at. pct-48 at.pct. The T-phase has a C-centered orthorhombic crystal structure, and the lattice parameters are a=0.965-1.020 nm,b=1.121-1.142nm, c=0.950-0.977 nm.
关键词:
Mg-Zn-La system
,
null
,
null
,
null
李洪晓
,
黄明丽
,
陈琴
,
任玉平
,
郝士明
金属学报
利用扫描电镜组织观察、X射线衍射结构分析以及电子探针定量成分分析对Mg-Zn-La系富Mg角300℃的固态相平衡进行了研究。结果表明，300℃时，在Mg-Zn-La系存在一个线性化合物(Mg,Zn)92La8(T相)；而且在Mg-Zn-La系富Mg角存在一个由此线性化合物和(Mg)相组成的宽阔的两相区，以及(Mg)+MgZn相+T相的三相区。
关键词:
Mg-Zn-La系
,
phase equilibria
