Phase Equilibrium of Mg-Zn-La System in Mg-Rich Corner from 200 to 350℃
Alloys of Mg-Zn-La system in Mg rich corner were prepared, and the phase relationship was investigated at different temperatures such as 200, 300 and 350℃ by scanning electron microscopy (SEM), X-ray diffraetion (XRD) and electron probe microanalysis with energy dispersive X-ray spectroscopy (EPMA). Two types of phase equilibrium were identified at the different temperatures. One is two-phase equilibrium contained the Mg solid solution and T-phase. The other is three-phase equilibrium which contained the Mg solid solution, MgZn phase and T-phase. T-phase was stable as the temperature changed. The La content in T-phase is constant which is about 8±0.3％ (atom fraction); but the Mg content and Zn content of that is changed, and the Zn content in T-phase was from 16.1％ to 44％. The solubility of La in MgZn phase was increased from 1.2％ to 1.6％ as the temperature increasing from 200 to 350℃.
Mg-Zn-La system phase equilibrium T-phase phase diagram rare earths
Huang Mingli(黄明丽) Li Hongxiao(李洪晓) Ding Hua(丁桦) Ren Yuping(任玉平) Hao Shiming(郝士明)
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
519-522
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）