Reactive Hot Pressing and Properties of Nb(2)AlC

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	Reactive Hot Pressing and Properties of Nb(2)AlC
	W. Zhang; N. Travitzky; C. F. Hu; Y. C. Zhou; P. Greil
	2009
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	92 期号:10 页码:2396-2399
摘要	Dense Nb(2)AlC ceramic was synthesized from NbC, Nb, and Al powder mixture at 1650 degrees C and a pressure of 30 MPa for 90 min using an in situ reaction/hot-pressing method. The reaction kinetics, microstructure, physical, and mechanical properties of the fabricated material were investigated. A thermal expansion coefficient of similar to 8.1 x 10(-6) K(-1) was measured in the temperature range of 30 degrees-1050 degrees C. At room temperature a thermal conductivity of similar to 20 W. (m. K)(-1) and a Vickers hardness of similar to 4.5 GPa were determined. The material attained Young's modulus, four-point bending strength and fracture toughness of similar to 294 GPa, similar to 443 MPa, and similar to 5.9 MPa. m(1/2), respectively. The nanolayered grains with a mean grain size of 17 mu m contributed to the damage tolerance of this ceramic. Quenching from 600 degrees, 800 degrees, and 1000 degrees C into water at room temperature resulted in decrease in bending strength from 443 MPa for the as-synthesized Nb(2)AlC to 391, 156, and 149 MPa, respectively.
部门归属	[zhang, wei; travitzky, nahum; greil, peter] univ erlangen nurnberg, dept mat sci, d-91058 erlangen, germany. [hu, chunfeng; zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;travitzky, n (reprint author), univ erlangen nurnberg, dept mat sci, d-91058 erlangen, germany;nahum.travitzky@ww.uni-erlangen.de
关键词	Liquid Reaction Synthesis (Ti Mechanical-properties Nb)(2)Alc Electrical-properties Bulk Cr2alc Ti3sic2 Ceramics Ti2alc Microstructure Carbides
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32569
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Zhang,N. Travitzky,C. F. Hu,et al. Reactive Hot Pressing and Properties of Nb(2)AlC[J]. Journal of the American Ceramic Society,2009,92(10):2396-2399.
APA	W. Zhang,N. Travitzky,C. F. Hu,Y. C. Zhou,&P. Greil.(2009).Reactive Hot Pressing and Properties of Nb(2)AlC.Journal of the American Ceramic Society,92(10),2396-2399.
MLA	W. Zhang,et al."Reactive Hot Pressing and Properties of Nb(2)AlC".Journal of the American Ceramic Society 92.10(2009):2396-2399.