Simulation of the first order phase transitions in binary alloys with variable mobility

被引：15

作者：

L'vov, P. E. ^{[1
]}

Svetukhin, V. V. ^{[1
,2
]}

机构：

[1] Ulyanovsk State Univ, Ulyanovsk, Russia

[2] Russian Acad Sci, Inst Nanotechnol Microelect, Moscow, Russia

来源：

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING | 2017年 / 25卷 / 07期

关键词：

first order phase transitions; binary alloy; Cahn-Hilliard equation; metastable state; CAHN-HILLIARD EQUATION; DENSITY-FUNCTIONAL METHOD; FOURIER-SPECTRAL METHOD; SPINODAL DECOMPOSITION; NONCLASSICAL NUCLEATION; FIELD SIMULATION; SOLID-SOLUTIONS; SEPARATION; KINETICS; STRAIN;

D O I：

10.1088/1361-651X/aa7fe3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The first order phase transitions in binary alloys were simulated basing on the Cahn-Hilliard equation for metastable states with mobility depending on the local composition. The simulation was carried out utilizing the semi-implicit Fourier spectral method for 3D fragment of a solid solution satisfying the regular solution approximation. We defined kinetics of the main characteristics of phase distribution: nucleation rate, average size, concentration of precipitates and autocorrelation function etc. Peculiarities of different stages of binary alloy decomposition (nucleation, diffusion growth and coarsening) were analyzed both for constant and variable mobility.

引用

页数：13

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