Thermodynamic modeling of the Li-Zn system

被引：35

作者：

Liang, Yu ^{[1
]}

Du, Zhenmin ^{[1
]}

Guo, Cuiping ^{[1
]}

Li, Changrong ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 455卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Li-Zn system; thermodynamic properties; order-disorder transition; CALPHAD technique;

D O I：

10.1016/j.jallcom.2007.01.154

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：

By means of CALPHAD (CALculation of PHAse Diagram) technique, the Li-Zn system was critically assessed. Three solution phases (liquid, body-centered cubic, hexagonal close-packed) were modeled with the Redlich-Kister equation. The compound LiZn2 was treated as stoichiometric compound. (alpha Li2Zn3, beta Li2Zn3, LiZn5 and alpha LiZn4, which had a homogeneity range, were treated as the formulae Li-2(Li,Zn)(3), (Li,Zn)(2)(Li,Zn)(3), (Li,Zn)(2)Zn-5 and (Li,Zn)(1)(Li,Zn)(4), respectively. A three-sublattice model (Li,Zn)(0.5)(Li,Zn)(0.5)(Va)(3) is applied to describe the compound LiZn in order to cope with the order-disorder transition between body-centered cubic solution (A2) and LiZn with NaTl-type structure (B32). Another three-sublattice model (Li,Zn)(0.2)(Li, Zn)(0.8)(Va)(0.5) is applied to describe the compound beta LiZn4 in order to cope with the order-disorder transition between hexagonal close-packed solution (A3) and beta LiZn4 with Mg-type structure. A set of self-consistent thermodynamic parameters of the Li-Zn system was obtained. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：236 / 242

页数：7