Thermodynamic optimization of the Nb-Si-W ternary system

被引：13

作者：

Li, Yan ^{[1
]}

Li, Changrong ^{[1
]}

Du, Zhenmin ^{[1
]}

Guo, Cuiping ^{[1
]}

机构：

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

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2013年 / 43卷

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Nb-Si-W ternary; Liquidus projection; Isothermal section; Thermodynamic optimization; Solidification analysis; STRENGTH; MO; TI; COMPOSITES; TOUGHNESS;

D O I：

10.1016/j.calphad.2013.04.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Based on the experimental measurements of the liquidus projection and the isothermal sections, the Nb-Si-W ternary system is thermodynamically assessed using the CALPHAD (CALculation of PHAse Diagram) approach. The parameters for the thermodynamic descriptions of all the phases in the system are optimized, following the reported descriptions of the three constituent binaries the Nb-Si, the Nb-W and the Si-W systems. Some of the parameters of the Si-W system are modified according to its related binary experimental data. The comparisons between the calculated liquidus projection and isothermal sections and the experimental ones show that the present modeling can finely describe the experimental results of the Nb-Si-W ternary system. The solidification analyses can explain the microstructure evolutions for typical ternary alloys. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：112 / 123

页数：12

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