Predicting growth direction of tilted dendritic arrays during directional solidification

被引：19
|
作者：
Wang, Zhijun [1 ]
Li, Junjie [1 ]
Wang, Jincheng [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 / 328卷 / 01期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Directional solidification; Tilted dendrites; Growth direction; Vector model; INTERFACE KINETICS; ANISOTROPY; CRYSTAL; MICROSTRUCTURES;
D O I：
10.1016/j.jcrysgro.2011.06.021
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Determinant factors for tilted growth dynamics of dendritic arrays during directional solidification are analyzed. A vector model of solutal gradient is proposed to predict the growth direction of tilted dendritic arrays based on the competition between the preferred crystalline dynamics and the solutal diffusion interaction of dendritic neighbors. Effects of the spacing Peclet number and thermal gradient on the tilted dynamics are clarified. The predicted growth direction from this vector model is in good agreement with previous results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：108 / 113
页数：6
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