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

页码：3946 / 3954

页数：9

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