Microstructural characterization and wear behavior of in situ TiC/7075 composites synthesized by displacement reactions and spray forming

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	Microstructural characterization and wear behavior of in situ TiC/7075 composites synthesized by displacement reactions and spray forming
	B. Yang; G. S. Gan; L. Yang; M. Sun; H. B. Zhang; Z. Z. Fang
	2011
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	528 期号:18 页码:5649-5655
摘要	A novel in situ reaction technique is developed to prepare TiC/7075 composites. This technique provides a new approach overcoming the problems of loss and agglomeration of reinforcement particles when they are in situ formed in a molten metal first and then injected into the spray cone of molten droplets during the spray forming process. Experimental results have shown that the presence of strip or rectangular-like Al(3)Ti, which is detrimental not only to the fracture toughness, but also to the stability of the microstructure, can be avoided completely from the final product by using a proper Ti:C molar ratio in the Ti-C-Al performs. The mechanisms of formation or absence of Al(3)Ti phase in the TiC/7075 composites are explained based on thermodynamics of the system. The modification of the microstructure of the spray-formed 7075 alloy can be understood in the light of atomic diffusion. The wear results showed that the wear rates of the spray-formed 7075 alloy and its composites increased with applied loads. At higher applied loads, the 7075 alloy exhibited superior wear resistance than that of the composites. This is attributed to increased microcracking tendency of the composites than the matrix alloy. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[yang, bin; gan, guisheng; sun, miao] univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china. [yang, bin] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [yang, lu] beijing univ technol, dept mat sci & engn, beijing 100124, peoples r china. [zhang, haibo; fang, zhigang zak] univ utah, dept met engn, salt lake city, ut 84112 usa.;yang, b (reprint author), univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china;byang@ustb.edu.cn
关键词	Microstructure In Situ Synthesis Tic parTicle 7075 Al Matrix Alloy Wear Resistance Matrix Composites Aluminum Alloys Al4c3
URL	查看原文
WOS记录号	WOS:000292170200001
引用统计	被引频次：31[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/321006/30817
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Yang,G. S. Gan,L. Yang,et al. Microstructural characterization and wear behavior of in situ TiC/7075 composites synthesized by displacement reactions and spray forming[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(18):5649-5655.
APA	B. Yang,G. S. Gan,L. Yang,M. Sun,H. B. Zhang,&Z. Z. Fang.(2011).Microstructural characterization and wear behavior of in situ TiC/7075 composites synthesized by displacement reactions and spray forming.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(18),5649-5655.
MLA	B. Yang,et al."Microstructural characterization and wear behavior of in situ TiC/7075 composites synthesized by displacement reactions and spray forming".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.18(2011):5649-5655.