Oxidation behavior of TiC-containing Ti3AlC2 based material at 500-900 degrees C in air

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	Oxidation behavior of TiC-containing Ti3AlC2 based material at 500-900 degrees C in air
	X. H. Wang; Y. C. Zhou
	2003
发表期刊	Materials Research Innovations
ISSN	1432-8917
卷号	7 期号:6 页码:381-390
摘要	The isothermal oxidation behavior of Ti3AlC2 based material containing 5 vol% TiC inclusion in air had been investigated at 500-900 degreesC by means of TGA, XRD, Raman spectroscopy and SEM/EDS. It was demonstrated that, although Ti3AlC2 based material exhibited good oxidation resistance at temperatures above 700 degreesC, anomalous oxidation with higher oxidation rate occurred at lower temperatures of 500 and 600 degreesC. This interesting phenomenon was due to the formation of microcracks associated with the stress developed within the scales, mainly consisting of anatase, and the volume expansion as Ti3AlC2 based material was directly exposed to air at those temperatures. Its oxidation, at temperatures investigated with the exception of 600 degreesC, generally obeyed a parabolic rate law. The weight gain data for the remaining temperatures were analyzed with an instantaneous parabolic rate constant method by assuming a parabolic rate law. The variations of instantaneous parabolic rate constant with time reflected the complexity of the oxidation behavior of Ti3AlC2 based material. These variations were discussed from the viewpoint of the formation of microcracks at 500 degreesC, and preferred oxidation of TiC inclusion in the initial oxidation and its subsequent depletion at 800 and 900 degreesC on the basis of X-ray diffraction, Raman spectroscopy, SEM scale morphology observation and composition analysis using EDS. In addition, the deleterious effect of TiC inclusion on the oxidation resistance of Ti3AlC2 based material was also investigated and discussed with comparison to monolithic Ti3AlC2, which was helpful to understand the discrepancies in reports on the oxidation of Ti3AlC2.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Ti3alc2 Ceramic Intermediate-temperature Oxidation Anomalous Oxidation Effect Of Tic High-temperature Oxidation Raman-spectra Titanium Aluminides Ti3sic2 Anatase Phase Tio2
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WOS记录号	WOS:000187129100007
引用统计	被引频次：42[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/321006/36059
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. H. Wang,Y. C. Zhou. Oxidation behavior of TiC-containing Ti3AlC2 based material at 500-900 degrees C in air[J]. Materials Research Innovations,2003,7(6):381-390.
APA	X. H. Wang,&Y. C. Zhou.(2003).Oxidation behavior of TiC-containing Ti3AlC2 based material at 500-900 degrees C in air.Materials Research Innovations,7(6),381-390.
MLA	X. H. Wang,et al."Oxidation behavior of TiC-containing Ti3AlC2 based material at 500-900 degrees C in air".Materials Research Innovations 7.6(2003):381-390.