东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (6): 796-800.DOI: 10.12068/j.issn.1005-3026.2015.06.009

• 材料与冶金 • 上一篇    下一篇

金属间化合物(Mg,Zn)12Ce与(Mg,Zn)11Ce的研究

黄明丽1,2, 李洪晓1, 丁桦1   

  1. (1.东北大学 材料与冶金学院, 辽宁 沈阳110819; 2.东北大学秦皇岛分校 资源与材料学院, 河北 秦皇岛066004)
  • 收稿日期:2014-04-21 修回日期:2014-04-21 出版日期:2015-06-15 发布日期:2015-06-11
  • 通讯作者: 黄明丽
  • 作者简介:黄明丽(1978-),女,黑龙江宝清人,东北大学副教授; 李洪晓(1968-),女,山东荣成人,东北大学教授; 丁桦(1958-),女,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51301032); 河北省自然科学基金资助项目(E2014501102).

Study on the Intermetallics (Mg,Zn)12Ce and (Mg,Zn)11Ce

HUANG Ming-li1,2, LI Hong-xiao1, DING Hua1   

  1. 1.School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China;2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
  • Received:2014-04-21 Revised:2014-04-21 Online:2015-06-15 Published:2015-06-11
  • Contact: HUANG Ming-li
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摘要: 对300℃时Mg-Zn-Ce系富镁侧化合物的成分特征、结构和相平衡关系进行了研究.结果表明,Mg-Zn-Ce富镁角存在一个Mg12Ce的二元置换固溶体(Mg,Zn)12Ce,还存在一个三元线性化合物(Mg,Zn)11Ce(τ相).(Mg,Zn)12Ce中Zn的范围为0~7.3%(原子分数),其晶体结构为体心四方晶格.三元线性化合物τ相含Zn为8.5%~43.5%(原子分数),其晶体结构为C底心正交晶格.(Mg,Zn)12Ce和τ相均与α(Mg)存在稳定的两相平衡,且在Mg-Zn-Ce系富镁角还存在三相平衡Mg+(Mg,Zn)12Ce+τ.

关键词: Mg-Zn-Ce系, 二元固溶体, 三元线性化合物, 相平衡

Abstract: Phase composition,crystal structure and the relationship the phase equilibria in Mg-rich corner of Mg-Zn-Ce system at 300℃ were studied. The results showed that a substitution binary solid solution of Mg12Ce identified as (Mg,Zn)12Ce and a linear ternary compound identified as (Mg,Zn)11Ce (τphase) were confirmed in Mg-rich corner of Mg-Zn-Ce system. The solid solubility of Zn in (Mg,Zn)12Ce is about 0~7.3% (atomic fraction), and the crystal structure of which is a body-centered tetragonal lattice structure. The Zn content of the linear ternaty compound τ phase is from 8.5% to 43.5% (atomic fraction), and the crystal structure of it is a C-centered orthorhombic lattice. Both (Mg,Zn)12Ce and τ phase were identified to be in two-phase equilibrim with α(Mg). A three-phase equilibrium of Mg+(Mg,Zn)12Ce+τ in Mg-rich corner of Mg-Zn-Ce system was also identified.

Key words: Mg-Zn-Ce alloys, binary solid solution, linear ternary compunds, phase equilibrium

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