In situ reaction synthesis, electrical and thermal, and mechanical properties of Nb(4)AlC(3)

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	In situ reaction synthesis, electrical and thermal, and mechanical properties of Nb(4)AlC(3)
	C. F. Hu; F. Z. Li; L. F. He; M. Y. Liu; J. Zhang; J. M. Wang; Y. W. Bao; J. Y. Wang; Y. C. Zhou
	2008
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	91 期号:7 页码:2258-2263
摘要	In this work, a bulk Nb(4)AlC(3) ceramic was prepared by an in situ reaction/hot pressing method using Nb, Al, and C as the starting materials. The reaction path, microstructure, physical, and mechanical properties of Nb(4)AlC(3) were systematically investigated. The thermal expansion coefficient was determined as 7.2 x 10(-6) K(-1) in the temperature range of 200 degrees-1100 degrees C. The thermal conductivity of Nb(4)AlC(3) increased from 13.5 W.(m.K)(-1) at room temperature to 21.2 W.(m.K)(-1) at 1227 degrees C, and the electrical conductivity decreased from 3.35 x 10(6) to 1.13 x 10(6) Omega(-1).m(-1) in a temperature range of 5-300 K. Nb(4)AlC(3) possessed a low hardness of 2.6 GPa, high flexural strength of 346 MPa, and high fracture toughness of 7.1 MPa.m(1/2). Most significantly, Nb(4)AlC(3) could retain high modulus and strength up to very high temperatures. The Young's modulus at 1580 degrees C was 241 GPa (79% of that at room temperature), and the flexural strength could retain the ambient strength value without any degradation up to the maximum measured temperature of 1400 degrees C.
部门归属	[hu, chunfeng; li, fangzhi; he, lingfeng; liu, mingyue; zhang, jie; wang, jiemin; bao, yiwang; wang, jingyang; zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [hu, chunfeng; li, fangzhi; he, lingfeng; zhang, jie; wang, jiemin] chinese acad sci, grad sch, beijing 100039, peoples r china.;zhou, y (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	Phase Thin-films Crystal-structure Pressing Method Ti3sic2 Ceramics Carbide Behavior Ta4alc3 Ti3alc2 Ti4aln3
URL	查看原文
WOS记录号	WOS:000257709100030
引用统计	被引频次：120[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/321006/32814
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. F. Hu,F. Z. Li,L. F. He,et al. In situ reaction synthesis, electrical and thermal, and mechanical properties of Nb(4)AlC(3)[J]. Journal of the American Ceramic Society,2008,91(7):2258-2263.
APA	C. F. Hu.,F. Z. Li.,L. F. He.,M. Y. Liu.,J. Zhang.,...&Y. C. Zhou.(2008).In situ reaction synthesis, electrical and thermal, and mechanical properties of Nb(4)AlC(3).Journal of the American Ceramic Society,91(7),2258-2263.
MLA	C. F. Hu,et al."In situ reaction synthesis, electrical and thermal, and mechanical properties of Nb(4)AlC(3)".Journal of the American Ceramic Society 91.7(2008):2258-2263.