computes simulation;
floating zone technique;
single crystal growth;
D O I:
10.1016/S0022-0248(01)00613-3
中图分类号:
O7 [晶体学];
学科分类号:
0702 ;
070205 ;
0703 ;
080501 ;
摘要:
The influence of growth parameters and melt convection on the solid-liquid interface of the intermetallic compound Ni3Si grown by the RF-floating zone technique was investigated experimentally as well as numerically. Numerical simulations showed that the heat transfer is strongly influenced by the electromagnetically driven and Marangoni convections whereas both the buoyancy and feed rotation have a negligible effect. It was found experimentally that the inductor design, the rod diameter and the length of the molten zone influence the solid-liquid interface shape significantly. The electromagnetically driven convection increases dramatically with increasing zone length due to the rapid increase of the non-uniformity of the magnetic field. The minimisation of the zone length and the application of an after heater reduce concave (towards the melt) interface regions which give rise to polycrystalline segments during RF-floating zone crystal growth of complicated intermetallic compounds. However, the adjustment of a complete convex solid-liquid interface shape in RF-floating zone crystal growth requires some additional melt stirring, e.g. by magnetic forces. (C) 2001 Elsevier Science B.V. All rights reserved.
机构:
Zhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Jiangsu Normal Univ, Sch Mechatron Engn, Xuzhou 221116, Jiangsu, Peoples R ChinaZhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Jiang, Nan
Zhang, Liang
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机构:
Zhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Jiangsu Normal Univ, Sch Mechatron Engn, Xuzhou 221116, Jiangsu, Peoples R ChinaZhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Zhang, Liang
Long, Wei-min
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Zhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R ChinaZhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Long, Wei-min
Zhong, Su-juan
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Zhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R ChinaZhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China
Zhong, Su-juan
Zhang, Lei
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Zhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R ChinaZhengzhou Res Inst Mech Engn, State Key Lab Adv Brazing Filler Met & Technol, Zhengzhou 450001, Peoples R China