Thermodynamic description of Sn-Y and Mg-Sn-Y systems

被引：7

作者：

Lu Dongxian ^{[1
]}

Guo Cuiping ^{[1
]}

Li Changrong ^{[1
]}

Du Zhenmin ^{[1
]}

机构：

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

来源：

JOURNAL OF RARE EARTHS | 2014年 / 32卷 / 07期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Sn-Y system; Mg-Sn-Y system; CALPHAD technique; thermodynamic parameters; rare earths; MECHANICAL-PROPERTIES; CREEP-BEHAVIOR; MICROSTRUCTURE; ZN; YTTRIUM; ALLOYS; PHASE; OPTIMIZATION; ND; ENTHALPIES;

D O I：

10.1016/S1002-0721(14)60121-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The thermodynamic optimization of the Sn-Y and Mg-Sn-Y systems was critically carried out by means of the CALPHAD (CALculation of PHAse Diagram) technique. In the Sn-Y system, the solution phases (liquid, bcc, bct and hcp) were described by the substitutional solution model. The compound Sn3Y5, which has a homogeneity range, was treated as the formula (Sn, Y)(3)(Sn, Y)(2)Y-3 by a three-sublattice model in accordance with the site occupancies. In the Mg-Sn-Y system, the liquid phase was treated as the formula (Mg, Sn, Y, Mg2Sn) using an associated solution model, and bcc, bct and hcp were treated as the formula (Mg, Sn, Y). The compound Sn3Y5 was treated as the formula (Sn, Y, Mg)(3)(Sn, Y, Mg)(2)Y-3. The ternary compound MgSnY was treated as stoichiometric compound. A set of self-consistent thermodynamic parameters of the Mg-Sn-Y system was obtained. The projection of the liquidus surfaces and the reaction scheme of the Mg-Sn-Y system were predicted.

引用

页码：648 / 654

页数：7

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