Diffusion under temperature gradient: A phase-field model study

被引:47
|
作者
Mohanty, R. R. [1 ,2 ]
Guyer, J. E. [3 ]
Sohn, Y. H. [1 ,2 ]
机构
[1] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Orlando, FL 32816 USA
[2] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA
[3] NIST, Div Met, Gaithersburg, MD 20899 USA
基金
美国国家科学基金会;
关键词
alloys; Monte Carlo methods; thermal diffusion; thermodynamics; THERMAL DIFFUSION; CONSTITUENT REDISTRIBUTION; ZR ALLOYS; CARBON; SYSTEM; THERMOMIGRATION; THERMOTRANSPORT; TRANSPORT; SOLIDS; IRON;
D O I
10.1063/1.3190607
中图分类号
O59 [应用物理学];
学科分类号
摘要
A diffuse interface model was devised and employed to investigate the effect of thermotransport (a.k.a., thermomigration) process in single-phase and two-phase alloys of a binary system. Simulation results show that an applied temperature gradient can cause significant redistribution of constituent elements and phases in the alloy. The magnitude and the direction of the redistribution depend on the initial composition, the atomic mobility and the heat of transport of the respective elements. In two-phase alloys, the thermomigration effect can cause the formation of single-element rich phases at the cold and hot ends of the alloy (i.e., demixing).
引用
收藏
页数:7
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