Thermodynamics and roughening of solid-solid interfaces

被引:20
|
作者
Angheluta, Luiza [1 ]
Jettestuen, Espen [1 ]
Mathiesen, Joachim [1 ]
机构
[1] Univ Oslo, Oslo, Norway
来源
PHYSICAL REVIEW E | 2009年 / 79卷 / 03期
关键词
free energy; interface roughness; mass transfer; solid-state phase transformations; stress analysis; Young's modulus; COHERENT INTERFACE; EQUILIBRIUM;
D O I
10.1103/PhysRevE.79.031601
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The dynamics of sharp interfaces separating two nonhydrostatically stressed solids is analyzed using the idea that the rate of mass transport across the interface is proportional to the thermodynamic potential difference across the interface. The solids are allowed to exchange mass by transforming one solid into the other, thermodynamic relations for the transformation of a mass element are derived and a linear stability analysis of the interface is carried out. The stability is shown to depend on the order of the phase transition occurring at the interface. Numerical simulations are performed in the nonlinear regime to investigate the evolution and roughening of the interface. It is shown that even small contrasts in the referential densities of the solids may lead to the formation of fingerlike structures aligned with the principal direction of the far field stress.
引用
收藏
页数:11
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