Improving the High-Temperature Oxidation Resistance of Nb4AlC3 by Silicon Pack Cementation

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	Improving the High-Temperature Oxidation Resistance of Nb4AlC3 by Silicon Pack Cementation
	L. Y. Zheng; J. Y. Wang; Y. C. Zhou
	2014
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	97 期号:2 页码:552-561
摘要	Niobium aluminum carbide (Nb4AlC3), as a member of the MAX phases, can retain its stiffness and strength up to over 1400 degrees C. However, its applications are limited due to its poor oxidation resistance at high temperatures. In this work, silicon pack cementation has been applied to improve the oxidation resistance of Nb4AlC3. After Si pack cementation at 1200 degrees C for 6h, a dense and uniform silicide coating which was mainly composed of NbSi2 and SiC and well bonded to the matrix was successfully formed on the surface of Nb4AlC3. The Si pack cemented Nb4AlC3 shows excellent oxidation resistance up to 1200 degrees C due to the formation of protective Al2O3 layer. The oxidation kinetics of the cemented Nb4AlC3 obey parabolic law all the way to up to 1200 degrees C, and the parabolic rate constants of cemented Nb4AlC3 are in the same order of magnitude as those of Ti3AlC2 in the temperature range 1000 degrees C-1200 degrees C. However, the oxidation of the cemented Nb4AlC3 was accelerated after oxidation at 1300 degrees C for about 15h due to the formation of NbAlO4.
部门归属	[zheng, liya ; wang, jingyang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [zheng, liya] chinese acad sci, grad sch, beijing 100039, peoples r china. [zhou, yanchun] arimpt, sci & technol adv funct composite lab, beijing 100076, peoples r china. ; zhou, yc (reprint author), arimpt, sci & technol adv funct composite lab, 1 south dahongmen rd, beijing 100076, peoples r china. ; yczhou714@gmail.com
关键词	Mechanical-properties Behavior Composites Protection Phases Air
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72509
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Y. Zheng,J. Y. Wang,Y. C. Zhou. Improving the High-Temperature Oxidation Resistance of Nb4AlC3 by Silicon Pack Cementation[J]. Journal of the American Ceramic Society,2014,97(2):552-561.
APA	L. Y. Zheng,J. Y. Wang,&Y. C. Zhou.(2014).Improving the High-Temperature Oxidation Resistance of Nb4AlC3 by Silicon Pack Cementation.Journal of the American Ceramic Society,97(2),552-561.
MLA	L. Y. Zheng,et al."Improving the High-Temperature Oxidation Resistance of Nb4AlC3 by Silicon Pack Cementation".Journal of the American Ceramic Society 97.2(2014):552-561.