The effect of 3-dimensional shear flow on the stability of a crystal interface in the supercooled binary melt

被引：2
作者：
Cao Bin [1 ]
Lin Xin [1 ]
Wang Meng [1 ]
Huang Weidong [1 ]
机构：
[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF CRYSTAL GROWTH | 2011年 / 327卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Convection; Crystal morphology; Diffusion; Alloys; MORPHOLOGICAL STABILITY; DIRECTIONAL SOLIDIFICATION; UNIDIRECTIONAL SOLIDIFICATION; INSTABILITIES; GROWTH; ALLOY;
D O I：
10.1016/j.jcrysgro.2011.05.017
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
A model is developed to investigate the effects of 3-dimensional shear flow on the stability of a crystal interface in the supercooled binary melt. The growth rate of the interface perturbation amplitude under shear flow is presented. It is found that the shear flow reduced the normal gradients of the perturbations of the temperature field and solute field, which can decrease therefore the growth rate of perturbation amplitude. The critical stability radius of the crystal interface increased with the shearing rate. The stability effect of shear flow decreased remarkably with increasing melt undercooling. (C) 2011 Elsevier B.V. All rights reserved.
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页码：140 / 145
页数：6
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