TEM investigation of the oxide scale of Ti-46.5Al-5Nb at 900 degrees C for 50 h

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	TEM investigation of the oxide scale of Ti-46.5Al-5Nb at 900 degrees C for 50 h
	W. Lu; C. L. Chen; Y. J. Xi; C. Y. Guo; F. H. Wang; L. L. He
	2007
发表期刊	Intermetallics
ISSN	0966-9795
卷号	15 期号:5-6 页码:824-831
摘要	In the present work, microstructure of oxide scale of Ti-46.5Al-5Nb oxidized for 50 h at 900 degrees C in air was investigated in both plane-viewed and cross-sectional samples using transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). In the TiO2 and Al2O3 mixture layer, orientation relationships (OR) between the Al2O3 and TiO2 phases were identified to be [1 (1) over bar 0](Al2O3)//[001](TiO2) and (001)(Al2O3)//(110)(TiO2), however, some misorientation existed at their interface. Besides, Nb enrichment was detected in the TiO2 phase in this layer but no Nb was found in the outer TiO2 layer. Al3Nb phase was identified between the oxide scale and TiAl base. This phase would promote TiAl oxidation protection due to hinder 'x' phase continuous formation. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. northeastern univ, coll sci, shenyang 110004, peoples r china. zhongyuan inst technol, dept chem & mat engn, zhengzhou, peoples r china. chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;he, ll (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;llhe@imr.ac.cn
关键词	Titanium Aluminides Electron Microscopy Based On Tial Oxidation Transmission Gamma-titanium Aluminides High-temperature Air Ti-al Alloys Oxidation Behavior Phase Microstructure Intermetallics Si
URL	查看原文
WOS记录号	WOS:000246739400040
引用统计	被引频次：31[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/321006/33742
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Lu,C. L. Chen,Y. J. Xi,et al. TEM investigation of the oxide scale of Ti-46.5Al-5Nb at 900 degrees C for 50 h[J]. Intermetallics,2007,15(5-6):824-831.
APA	W. Lu,C. L. Chen,Y. J. Xi,C. Y. Guo,F. H. Wang,&L. L. He.(2007).TEM investigation of the oxide scale of Ti-46.5Al-5Nb at 900 degrees C for 50 h.Intermetallics,15(5-6),824-831.
MLA	W. Lu,et al."TEM investigation of the oxide scale of Ti-46.5Al-5Nb at 900 degrees C for 50 h".Intermetallics 15.5-6(2007):824-831.