Morphological and Crystallographic Characterization of Primary Zinc-Rich Crystals in a Ternary Sn-Zn-Bi Alloy under a High Magnetic Field

被引:5
|
作者
Li, Lei [1 ,2 ]
Ban, Chunyan [1 ,2 ]
Zhang, Ruixue [1 ,2 ]
Zhang, Haitao [1 ,2 ]
Cai, Minghui [2 ]
Zuo, Yubo [1 ,2 ]
Zhu, Qingfeng [1 ,2 ]
Wang, Xiangjie [1 ,2 ]
Cui, Jianzhong [1 ,2 ]
机构
[1] Northwestern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Liaoning, Peoples R China
[2] Northwestern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
来源
CRYSTALS | 2017年 / 7卷 / 07期
关键词
high magnetic field; solidification; zinc-rich crystal; characterization; crystallography; EBSD; FORCED ELECTROMAGNETIC VIBRATIONS; DIRECTIONAL SOLIDIFICATION; PRECIPITATION BEHAVIOR; ALUMINUM-ALLOYS; ORIENTATION; GROWTH; PHASE; IMPOSITION; SUPERALLOY; INTERFACE;
D O I
10.3390/cryst7070204
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Due to the unique capacity for structural control, high magnetic fields (HMFs) have been widely applied to the solidification process of alloys. In zinc-based alloys, the primary zinc-rich crystals can be dendritic or needle-like in two dimensions. For the dendritic crystals, their growth pattern and orientation behaviors under HMFs have been investigated. However, the three-dimensional crystallographic growth pattern and the orientation behaviors of the needle-like primary zinc-rich crystals under a high magnetic field have not been studied. In this work, a ternary Sn-Zn-Bi alloy was solidified under different HMFs. The above-mentioned two aspects of the needle-like primary zinc-rich crystals were characterized using the Electron Backscattered Diffraction (EBSD) technique. The results show that the primary zinc-rich crystals are characterized by the plate-shaped faceted growth in three dimensions. They grow in the following manner: spreading rapidly in the {0001} basal plane with a gradual decrease in thickness at the edges. The application of HMFs has no effect on the growth form of the primary zinc-rich crystals, but induces their vertical alignment. Crystallographic analysis indicates that the vertically aligned primary zinc-rich crystals orient preferentially with the c-axis perpendicular to the direction of the magnetic field.
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页数:11
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