Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 24    No. 3    March 2014

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Isothermal section of Mg-Nd-Gd ternary system at 723 K
Long XIAO1, Yan ZHONG1, Cui-ping CHEN1, Ming-ming WULIU1, Tian-kuang LUO1, Li-bin LIU1,2, Kui LIN3

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Education Ministry Key Laboratory of Non-ferrous Materials Science and Engineering, Changsha 410083, China;
3. Guangxi Research Center of Analysis & Test, Nanning 530022, China

Abstract:An isothermal section of the Mg-Nd-Gd ternary system at 723 K was established by diffusion triple technique and electron probe microanalysis (EPMA). Mg3Gd and Mg3Nd form a continuous solid solution (Gd,Nd)3Mg, and a continuous solid solution (Gd,Nd)Mg is also formed between MgGd and MgNd. Mg7Gd, Mg5Gd, Mg2Gd, Mg41Nd5, (Gd,Nd)3Mg and (Gd,Nd)Mg are found in the ternary system. In these intermetallic phases, Mg7Gd has been reported to be a metastable phase in previous literatures. The solubilities of Mg, Gd and Nd in all the phases were detected. Furthermore, four three-phase equilibria, α(Mg)+Mg7Gd+ Mg41Nd5, Mg7Gd+Mg5Gd+Mg41Nd5, Mg5Gd+Mg41Nd5+(Gd,Nd)3Mg and (Gd,Nd)3Mg+(Gd,Nd)Mg+Mg2Gd, were identified in the isothermal section.

 

Key words: magnesium alloy; Mg-Nd-Gd; diffusion triple; phase diagram; isothermal section

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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