Oxidation Behavior of a Ti(3)AlC(2)/TiB(2) Composite at 1000 degrees-1400 degrees C in Air

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	Oxidation Behavior of a Ti(3)AlC(2)/TiB(2) Composite at 1000 degrees-1400 degrees C in Air
	M. S. Li; C. Li; J. J. Li; Y. C. Zhou
	2010
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	93 期号:2 页码:554-560
摘要	The oxidation behaviors of a Ti(3)AlC(2)/20(vol%)TiB(2) composite, synthesized by means of in situ reactions of Ti, Al, graphite, and B(4)C powder mixtures under hot pressing, have been investigated at 1000 degrees-1400 degrees C in air. The Ti(3)AlC(2)/20TiB(2) composite followed the logarithmic oxidation law, and had a lower oxidation rate than the matrix Ti(3)AlC(2). During the oxidation at 1000 degrees-1400 degrees C, a continuous Al(2)O(3) formed on the composite, meanwhile other different oxides formed on the top surface of the Al(2)O(3) layer, depending on the oxidation temperature: discontinuous alpha-TiO(2) at below 1200 degrees C, mixture of Al(2)TiO(5) and TiO(2) at 1300 degrees C, and continuous Al(2)TiO(5) at 1400 degrees C. The selective oxidation of Al occurred at the oxide/substrate interface through inward diffusion of oxygen, and TiO(2) overgrew the Al(2)O(3) layer to form coarse grains through outward diffusion of titanium ions. When the temperature was above 1280 degrees C, Al(2)TiO(5) appeared due to a eutectic reaction between TiO(2) and Al(2)O(3). The incorporation of TiB(2) promoted the generation of great numbers of voids at the Al(2)O(3)/substrate interface and in the Al(2)O(3) inner layer, which is proposed as being the main reason for the Ti(3)AlC(2)/20TiB(2) composite to follow a logarithmic oxidation law.
部门归属	[li, meishuan; li, chao; li, jingjing; zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang, peoples r china. [li, chao] liaoning univ, coll light ind, shenyang 110036, peoples r china.;li, ms (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang, peoples r china;mshli@imr.ac.cn
关键词	High-temperature Oxidation Ternary Carbide Ti3alc2 tin+1alxn N=1-3 Oxide Scale Microstructures Coatings System
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31224
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. S. Li,C. Li,J. J. Li,et al. Oxidation Behavior of a Ti(3)AlC(2)/TiB(2) Composite at 1000 degrees-1400 degrees C in Air[J]. Journal of the American Ceramic Society,2010,93(2):554-560.
APA	M. S. Li,C. Li,J. J. Li,&Y. C. Zhou.(2010).Oxidation Behavior of a Ti(3)AlC(2)/TiB(2) Composite at 1000 degrees-1400 degrees C in Air.Journal of the American Ceramic Society,93(2),554-560.
MLA	M. S. Li,et al."Oxidation Behavior of a Ti(3)AlC(2)/TiB(2) Composite at 1000 degrees-1400 degrees C in Air".Journal of the American Ceramic Society 93.2(2010):554-560.