Phase stability of magnesium-rare earth binary systems from first-principles calculations

被引:64
|
作者
Tao, Xiaoma [1 ,2 ]
Ouyang, Yifang [1 ,4 ]
Liu, Huashan [2 ]
Feng, Yuanping [3 ]
Du, Yong [4 ]
He, Yuehui [4 ]
Jin, Zhanpeng [2 ]
机构
[1] Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China
[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[3] Natl Univ Singapore, Dept Phys, Singapore 119260, Singapore
[4] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
First-principles; Mg-RE alloys; Thermodynamic property; Electronic structure; TOTAL-ENERGY CALCULATIONS; THERMODYNAMIC ASSESSMENT; CE SYSTEM; CRYSTAL-STRUCTURE; PART II; ER-MG; GD; ND; DY; ALLOYS;
D O I
10.1016/j.jallcom.2011.03.177
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 comprehensive investigation to cohesive properties of 344 intermetallic compounds in 17 Mg-RE (RE = Sc, Y, and Lanthanide elements) binary system has been carried out systematically in the framework of density-functional theory (DFT) type first-principles with the generalized gradient approximation (GGA). The calculated properties at present work; including total energy, enthalpy of formation, equilibrium volume, bulk modulus, and electronic structure, was consistent with the experimental data. It was convinced that both DO3-Mg3RE and B2-MgRE were stable compounds in Mg-RE systems except Mg3Eu, Mg3Yb and Mg3Lu in Mg3RE series and MgYb for B2-MgRE branch extracting from calculated results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:6899 / 6907
页数:9
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