Structure stability of Ti3AlC2 in Cu and microstructure evolution of Cu-Ti3AlC2 composites

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	Structure stability of Ti3AlC2 in Cu and microstructure evolution of Cu-Ti3AlC2 composites
	J. Zhang; J. Y. Wang; Y. C. Zhou
	2007
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	55 期号:13 页码:4381-4390
摘要	The structural stability of Ti3AlC2 in Cu and the microstructure evolution of Cu-Ti3AlC2 composites prepared at different temperatures were investigated by high-resolution transmission electron microscopy and X-ray diffraction. A mild reaction between Ti3AlC2 and Cu occurred at 850-950 degrees C, and strong reactions occurred above 950 degrees C. The reaction was identified as diffusion of Al from Ti3AlC2 into Cu to form Cu(Al) solid solution. Ti3AlC2 retained its structure under the partial loss of Al. Further depletion of Al resulted in highly defective Ti3AlC2 accompanied by the inner diffusion of Cu into Ti3AlC2 along the passway left by the Al vacancies. When Al was removed, Ti3AlC2 decomposed and transformed into cubic TiCx. In addition, TiC twins formed by the aggregation of C vacancies at twin boundaries. With the help of first-principles calculation and image simulation, an ordered hexagonal TiC, was identified as a transition phase linking Ti3AlC2 and c-TiCx. The effect of the reaction and phase transformation on the microstructure and properties of Cu-Ti3AlC2 composites was also discussed. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, grad sch, beijing 100039, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;yczhou@imr.ac.cn
关键词	Ti3alc2 Ceramics Microstructure Hrtem Interface Liquid Reaction Synthesis Titanium Carbide Ti3sic2 Si Behavior Al Oxidation Aluminum Crystal Alloys
URL	查看原文
WOS记录号	WOS:000248436400014
引用统计	被引频次：127[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/321006/34032
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,J. Y. Wang,Y. C. Zhou. Structure stability of Ti3AlC2 in Cu and microstructure evolution of Cu-Ti3AlC2 composites[J]. Acta Materialia,2007,55(13):4381-4390.
APA	J. Zhang,J. Y. Wang,&Y. C. Zhou.(2007).Structure stability of Ti3AlC2 in Cu and microstructure evolution of Cu-Ti3AlC2 composites.Acta Materialia,55(13),4381-4390.
MLA	J. Zhang,et al."Structure stability of Ti3AlC2 in Cu and microstructure evolution of Cu-Ti3AlC2 composites".Acta Materialia 55.13(2007):4381-4390.