Phase-field analysis of a ternary two-phase diffusion couple with multiple analytical solutions

被引：12
|
作者：
Heulens, J. [1 ]
Blanpain, B. [1 ]
Moelans, N. [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Heverlee, Belgium
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 10期
关键词：
Phase-field models; Diffusion; Theory and modeling; Computational thermodynamics; Diffusion couple; TRANSFORMATIONS; SIMILARITY; PRINCIPLE; DATABASE; PATHS;
D O I：
10.1016/j.actamat.2011.03.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Under certain conditions, there are multiple analytical solutions for the interface velocity in ternary two-phase diffusion couples. We have tackled this degeneracy problem by employing an isothermal phase-field model for diffusion couples that allows comparison with the analytical solutions. We find that, besides the three analytically predicted single-interface diffusion paths, a triple-interface diffusion path can also form. Furthermore, analysis of the phase-field simulation results shows that the Gibbs energies of both the bulk phases and the interfaces must be considered to determine uniquely the evolution of a diffusion couple, in case whether a single or multiple interfaces form. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3946 / 3954
页数：9
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