Microstructure Formation in a Directionally Solidified Immiscible Alloy

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	Microstructure Formation in a Directionally Solidified Immiscible Alloy
	H. L. Li; J. Z. Zhao; Q. X. Zhang; J. He
	2008
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	39A 期号:13 页码:3308-3316
摘要	Directional solidification experiments were carried out with an Al-Pb alloy. A model was developed to analyze the microstructure evolution in a directionally solidified immiscible alloy by taking into account the common actions of the nucleation and the diffusional growth/shrinkage of the minority phase droplets (MPDs), the spatial phase segregation, and the convections of the melt. The microstructure formation under the practical situations was calculated. The numerical results agree with the experimental ones well. They demonstrate that the convective flow against the solidification direction causes an increase in the nucleation rate, while the convective flow along the solidification direction causes a decrease in the nucleation rate. The convective flow leads to a more nonuniform distribution of the MPDs in the melt. It causes an increase in the size of the largest MPDs and is against the obtaining of the immiscible alloys with a well-dispersed microstructure.
部门归属	[li, haili; zhao, jiuzhou; zhang, qinxia; he, jie] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china.;li, hl (reprint author), chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china;jzzhou@imr.ac.cnc
关键词	Liquid Miscibility Gap Zn-pb Alloys Hypermonotectic Alloys Al-in Evolution Microgravity Nucleation Droplets Kinetics
URL	查看原文
WOS记录号	WOS:000260838700031
引用统计	被引频次：30[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/321006/32868
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. L. Li,J. Z. Zhao,Q. X. Zhang,et al. Microstructure Formation in a Directionally Solidified Immiscible Alloy[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2008,39A(13):3308-3316.
APA	H. L. Li,J. Z. Zhao,Q. X. Zhang,&J. He.(2008).Microstructure Formation in a Directionally Solidified Immiscible Alloy.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,39A(13),3308-3316.
MLA	H. L. Li,et al."Microstructure Formation in a Directionally Solidified Immiscible Alloy".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 39A.13(2008):3308-3316.