Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites

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	Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites
	H. W. Zhang; L. Geng; G. H. Fan; Y. Sun
	2013
发表期刊	Journal of Wuhan University of Technology-Materials Science Edition
ISSN	1000-2413
卷号	28 期号:2 页码:274-278
摘要	SiCp/Al-Mg metal matrix composites were manufactured by semi-solid stirring technique. The composites were remelted and then solidified under different pressures to study the solidification behavior of composites by differential thermal analysis, scanning electron microscopy, and transmission electron microscopy. The experimental results show that SiCp reinforcements can not act as heterogeneous nucleation sites for alpha(Al), and an interfacial layer composed of MgAl2O4 spinel and Si-rich phase existed at Al/SiCp interface. The undercooling of the matrix alloy was improved by the pressure applied, resulting in the grain of matrix alloy refining. The X-ray diffraction pattern of composites testified that the matrix alloy exhibited a certain preferred orientation during solidification. In addition, with increasing the pressure for solidification, the pored defects in the composites decreased, while the relative density, hardness and compressive strength increased. Therefore, the microstructure and mechanical properties of the composites were improved by pressure placed during the solidification of SiCp/Al-Mg composites.
部门归属	[zhang hongwei ; geng lin ; fan guohua] harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china. [sun yuan] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; geng, l (reprint author), harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china. ; hongweizhang@imr.ac.cn ; genglin@hit.edu.cn
关键词	Mmcs Nucleation Solidification Behavior Microstructure Mechanical Properties Metal-matrix Composites Alloy Nucleation Aluminum Microstructure
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71678
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. W. Zhang,L. Geng,G. H. Fan,et al. Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites[J]. Journal of Wuhan University of Technology-Materials Science Edition,2013,28(2):274-278.
APA	H. W. Zhang,L. Geng,G. H. Fan,&Y. Sun.(2013).Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites.Journal of Wuhan University of Technology-Materials Science Edition,28(2),274-278.
MLA	H. W. Zhang,et al."Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites".Journal of Wuhan University of Technology-Materials Science Edition 28.2(2013):274-278.