Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (6): 796-800.DOI: 10.12068/j.issn.1005-3026.2015.06.009

• Materials & Metallurgy • Previous Articles     Next Articles

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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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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