Directional solidification and microstructural refinement of immiscible alloys

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	Directional solidification and microstructural refinement of immiscible alloys
	J. He; J. Z. Zhao; H. L. Li; X. F. Zhang; Q. X. Zhang
	2008
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	39A 期号:5 页码:1174-1182
摘要	The directional solidification has been carried out for Al-9, 12Bi, and Al-3.4Bi-2.5Si (wt pct) alloys in a Bridgman apparatus with a transversal magnetic field. The microstructure of the alloy samples solidified at different melt superheat (MS) temperatures and magnetic field strengths has been observed. It was indicated that the average size of the Bi-rich spheres and the primary dendrite spacing decrease with the increase of the melt superheat (MS) temperature. The effect of the MS treatment on the interface morphology and the interaction between the spheres and the solidification interface has been discussed for the immiscible alloys. Moreover, the influence of the transverse magnetic field on the solidification microstructure was analyzed. The larger the magnetic field strength, the smaller is the average size of the spheres. The effects of the magnetic field on the spheres' nucleation, the spatial movement, and the collision between the spheres were discussed. The application of the magnetic field results in the formation of the sphere-aligned structure even for the hypermonotectic alloys, and the formation mechanism has been explained in this article.
部门归属	[he, jie; zhao, jiuzhou; li, haili; zhang, xianfei; zhang, qinxia] chinese acad sci, inst met res, shenyang 110016, peoples r china.;he, j (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jiehe@imr.ac.cn
关键词	Interface Growth Particles Stability Field Flow Pb
URL	查看原文
WOS记录号	WOS:000254776700021
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32799
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. He,J. Z. Zhao,H. L. Li,et al. Directional solidification and microstructural refinement of immiscible alloys[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2008,39A(5):1174-1182.
APA	J. He,J. Z. Zhao,H. L. Li,X. F. Zhang,&Q. X. Zhang.(2008).Directional solidification and microstructural refinement of immiscible alloys.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,39A(5),1174-1182.
MLA	J. He,et al."Directional solidification and microstructural refinement of immiscible alloys".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 39A.5(2008):1174-1182.