MICROSCOPIC THEORY FOR ANTIPHASE BOUNDARY MOTION AND ITS APPLICATION TO ANTIPHASE DOMAIN COARSENING

被引：2873

作者：

ALLEN, SM ^{[1
]}

CAHN, JW ^{[1
]}

机构：

[1] NBS, CTR MAT SCI, WASHINGTON, DC 20234 USA

来源：

ACTA METALLURGICA | 1979年 / 27卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0001-6160(79)90196-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A microscopic diffusional theory for the motion of a curved antiphase boundary is presented. The interfacial velocity is found to be linearly proportional to the mean curvature of the boundary, but unlike earlier theories the constant of proportionality does not include the specific surface free energy, yet the diffusional dissipation of free energy is shown to be equal to the reduction in total boundary free energy. The theory is incorporated into a model for antiphase domain coarsening. Experimental measurements of domain coarsening kinetics in Fe-Al alloys were made over a temperature range where the specific surface free energy was varied by more than two orders of magnitude. The results are consistent with the theory; in particular, the domain coarsening kinetics do not have the temperature dependence of the specific surface free energy. © 1979.

引用

页码：1085 / 1095

页数：11

共 43 条

[1] COHERENT AND INCOHERENT EQUILIBRIA IN IRON-RICH IRON-ALUMINUM ALLOYS [J].