Phase-field modelling of solute trapping during rapid solidification of a Si-As alloy

被引：62
|
作者：
Danilov, D. [1 ]
Nestler, B. [1 ]
机构：
[1] Karlsruhe Univ Appl Sci, Inst Appl Res, D-76133 Karlsruhe, Germany
来源：
ACTA MATERIALIA | 2006年 / 54卷 / 18期
关键词：
rapid solidification; interface segregation; bulk diffusion; interface diffusion; phase-field models;
D O I：
10.1016/j.actamat.2006.05.045
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of nonequilibrium solute trapping by a growing solid under rapid solidification conditions is studied using a phase-field model. Considering a continuous steady-state concentration profile across the diffuse solid-liquid interface, a new definition of the nonequilibrium partition coefficient in the phase-field context is introduced. This definition leads, in particular for high growth velocities, to a better description of the available experimental data in comparison with other diffuse interface and sharp interface predictions. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4659 / 4664
页数：6
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