Phase Equilibria at 500 A°C of the Mg-Gd-La System

被引：3

作者：

Xu, Honghui ^{[1
]}

Zhang, Fan ^{[1
]}

Huang, Yangbin ^{[1
]}

Li, Na ^{[1
]}

Li, Jing ^{[1
]}

Zhou, Tao ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2015年 / 36卷 / 05期

基金：

中国国家自然科学基金;

关键词：

EPMA; Mg-Gd-La system; phase diagram; rare earth alloys and compounds; x-ray diffraction;

D O I：

10.1007/s11669-015-0400-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase equilibria at 500 A degrees C of the Mg-Gd-La system were investigated via a combination of a diffusion couple technique and an equilibrated alloys method, by means of the electron probe microanalyses and x-ray diffraction technique. The LaMg2 and La5Mg41 phases in the Mg-La system were found to exist stably at 500 A degrees C. Continuous solid solutions of (Gd,La)Mg and (Gd,La)Mg-3 form between GdMg and LaMg and between GdMg3 and LaMg3, respectively. No ternary compound was found. Five three-phase equilibria, i.e. (Mg) + LaMg12 + GdMg5, LaMg12 + La2Mg17 + GdMg5, GdMg5 + La5Mg41 + (Gd,La)Mg-3, GdMg2 + (Gd,La)Mg-3 + (Gd,La)Mg and LaMg2 + (Gd,La)Mg-3 + (Gd,La)Mg, were accurately determined. The isothermal section at 500 A degrees C was constructed in the present work.

引用

页码：445 / 452

页数：8

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