The oxidation behavior of Ti-46.5Al-5Nb at 900 degrees C

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	The oxidation behavior of Ti-46.5Al-5Nb at 900 degrees C
	W. Lu ; C. L. Chen ; Y. J. Xi ; F. H. Wang ; L. L. He
刊名	Intermetallics
	2007
卷号	15 期号:8 页码:989-998
关键词	titanium aluminides based on TiAl oxidation electron microscopy transmission gamma-titanium aluminides high-temperature air intermetallic alloys ternary-system tial alloys tem phase microstructure kappa-al2o3 diffraction
ISSN号	0966-9795
中文摘要	The early stages of Ti-46.5Al-5Nb (at%) oxidation at 900 degrees C have been investigated combined with TEM and STEM. The results reveal that a layer composed of polycrystalline TiO2 and amorphous Al2O3 phase formed firstly after 5-min oxidation. The base alloy connected with the oxide scale has some deformation compared with the inner full lamellar TiAl structure. After 30-min oxidation, the phases of gamma-Al2O3, kappa-Al2O3, titanium nitrides and Ti5Al3O2 were formed in the area from the nitride layer to base alloy. After 50 h of oxidation, Ti5Al3O2 vanishes at the interface of oxide scale/base alloy in Ti-46.5Al-5Nb, contrary to the continuous formation of Ti5Al3O2 in gamma-TiAl at the interface of oxide scale[base alloy, Al3Nb phase formed in this zone, which hinders the continuous formation of Ti5Al3O2. (C)2007 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000248065300001
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33743]
专题	金属研究所_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. The oxidation behavior of Ti-46.5Al-5Nb at 900 degrees C[J]. Intermetallics,2007,15(8):989-998.
APA	W. Lu,C. L. Chen,Y. J. Xi,F. H. Wang,&L. L. He.(2007).The oxidation behavior of Ti-46.5Al-5Nb at 900 degrees C.Intermetallics,15(8),989-998.
MLA	W. Lu,et al."The oxidation behavior of Ti-46.5Al-5Nb at 900 degrees C".Intermetallics 15.8(2007):989-998.