Thermodynamic model of alloy grain boundaries

被引：9

作者：

Kirchner, A. ^{[1
]}

Kieback, B. ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

来源：

SCRIPTA MATERIALIA | 2011年 / 64卷 / 05期

关键词：

Grain boundaries; Interface segregation; Metal and alloys; Thermodynamics; Equation of state; EQUATION-OF-STATE; UNIVERSAL EQUATION; SEGREGATION; CU; AG; SIZE;

D O I：

10.1016/j.scriptamat.2010.10.043

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A facile thermodynamic model for grain boundaries in dilute alloys is developed. The macroscopic analysis is based on known descriptions of metallic solutions and the universal equation of state. The thermodynamic variable free energy is derived as a function of composition and excess volume. Employing Guggenheim's condition for equilibrium between bulk and grain boundaries, the segregation behavior and the interface free energy of two model systems, copper-silver and copper-bismuth, are calculated. The results show good agreement with experimental data. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：406 / 409

页数：4

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