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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 3    June 2009

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Partial phase relationships of Mg-Zn-Ce system at 350 ℃
HUANG Ming-li(黄明丽)1, 2, LI Hong-xiao(李洪晓)1, DING Hua(丁 桦)1,
REN Yu-ping(任玉平)1, QIN Gao-wu(秦高梧)1, HAO Shi-ming(郝士明)1

1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education),
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
2. Department of Materials Science and Engineering, Northeastern University (Qinhuangdao),
Qinhuangdao 110004, China

Abstract:The alloys were prepared in Mg-rich corner of Mg-Zn-Ce system. Partial phase equilibrium relationships of these alloys at 350 ℃ were identified by using scanning electron microscopy(SEM), electron probe microanalysis(EPMA), X-ray diffraction(XRD) analysis and selected area electron diffraction(SAED) pattern analysis of transmission electron microscopy(TEM). Partial isothermal section of Mg-Zn-Ce system in Mg-rich corner was identified. The results show that there is one ternary compound (T-phase) in Mg-Zn-Ce system. The T-phase is a linear ternary compound in which the content of Ce is about 7.7% (molar fraction); while the content of Zn is changed from 19.3% to 43.6% (molar fraction). The crystal structure of T-phase is C-centered orthorhombic. In addition, one two-phase region of Mg+T-phase and one three-phase region of Mg+T-phase+MgZn(Ce) exist in the Mg-rich corner of Mg-Zn-Ce system at 350 ℃.

 

Key words: Mg-Zn-Ce system; phase equilibrium; two-phase region; three-phase region; T-phase

ISSN 1672-7029
CN 43-1423/U

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