Development of grain structures in highly undercooled germanium and copper

被引：32
作者：
Li, D
Eckler, K
Herlach, DM
机构：
[1] Institut für Raumsimulation, DLR
来源：
JOURNAL OF CRYSTAL GROWTH | 1996年 / 160卷 / 1-2期
关键词：
D O I：
10.1016/0022-0248(95)00550-1
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The microstructures of bulk Ge and Cu samples solidified from undercooled liquid were investigated. High levels of undercooling were attained by containerless electromagnetic processing and melt fluxing. For both faceted material Ge and non-faceted Cu, a twin microstructure was formed in a certain range of undercooling, whereas the twins were completely replaced by fine equiaxed grains at larger undercooling. The structural transformation in the two materials was analyzed with respect to the relation between undercooling and the velocity of free crystal growth, twinning mechanisms, and a dendrite break-up model.
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页码：59 / 65
页数：7
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