Phase equilibria of the Mg-La-Nd system at 500 °C

被引：11

作者：

Zhang, Fan ^{[1
]}

Xu, Honghui ^{[1
]}

Du, Yong ^{[1
]}

Schmid-Fetzer, Rainer ^{[2
]}

Zhou, Tao ^{[1
]}

机构：

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

[2] Tech Univ Clausthal, Inst Met, D-38678 Clausthal Zellerfeld, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 585卷

基金：

中国国家自然科学基金;

关键词：

Phase equilibria; Mg-La-Nd; Diffusion couples; Magnesium alloys; EPMA; X-ray diffraction; EARTH MAGNESIUM COMPOUNDS; ISOTHERMAL SECTION; MAGNETIC-PROPERTIES; TERNARY-SYSTEM; ALLOYS; 500-DEGREES-C; HYDROGEN;

D O I：

10.1016/j.jallcom.2013.09.166

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 degrees C of the Mg-La-Nd system were investigated with four diffusion couples and 38 alloys, by means of X-ray diffraction technique, scanning electron microscopy and electron probe microanalyses. Five three-phase equilibria were accurately determined. The Mg2La phase, which is not stable at 500 degrees C in the Mg-La binary system, was found to be stabilized with the addition of Nd. The composition range of the ternary Mg2La phase was measured to be similar to 0-12.6 at.% Nd at 500 degrees C. The Mg41La5 phase, which is not stable at 500 degrees C in the Mg-La binary system, is stabilized at 500 degrees C with the addition of Nd. The solubility of La in Mg41Nd5 was measured to be up to 7.4 at.% La. The solubility of Nd in Mg17La2 and in Mg12La was determined to be 1.4 at.% Nd and 5.1 at.% Nd, respectively. The continuous solid solutions Mg(La, Nd) and Mg-3(La, Nd) form between MgLa and MgNd and between Mg3La and Mg3Nd, respectively. The isothermal section at 500 degrees C was constructed in the present work. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：384 / 392

页数：9

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