Oxidation resistance of TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy

doi:10.1016/j.surfcoat.2009.12.023

IMR OpenIR

	Oxidation resistance of TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy
	Kong, Lingyan; Qi, Jianzhong; Lu, Bin; Yang, Rui; Cui, Xinyu; Li, Tiefan; Xiong, Tianying
通讯作者	Xiong, Tianying(tyxiong@imr.ac.cn)
	2010-04-15
发表期刊	SURFACE & COATINGS TECHNOLOGY
ISSN	0257-8972
卷号	204 期号:14 页码:2262-2267
摘要	The TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy was prepared by cold spray. Oxidation in air at 950 degrees C indicated that the bare alloy exhibited poor oxidation resistance due to the formation of TiO2/AlNbO4 mixture and intended to scale off at the TiO2 rich zone. A nitride layer about 2 mu m was formed under the oxide layer. The oxygen invaded deeply into the alloy and caused severe microhardness enhancement in the near Surface region. The TiAl3-Al composite coating exhibited Parabolic oxidation kinetics and showed no sign of degradation after oxidized up to 1098 h at 950 degrees C in air under quasi-isothermal condition. No scaling of the coating was observed after oxidized at 950 degrees C up to the tested 150 cycles. The major oxide in the oxidized coating was Al2O3. The AlTi2N, TiAl and small amount of TiO2 were also observed in the oxidized coating. The EPMA and microhardness tests showed that inward oxygen diffusion was prevented by the interlayer, which was formed between the composite coating and the substrate during heat-treatment. Microstructure analyses demonstrated that the interlayer play a major role in protecting the substrate alloy from high temperature oxidation and interstitial embrittlement. (C) 2009 Elsevier B.V. All rights reserved.
关键词	Ti-22Al-26Nb TiAl3-Al coating Cold spray High temperature oxidation
资助者	National Natural Science Foundation of China
DOI	10.1016/j.surfcoat.2009.12.023
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50971127]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:000275920900025
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：27[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/321006/101239
专题	中国科学院金属研究所
通讯作者	Xiong, Tianying
作者单位	Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Kong, Lingyan,Qi, Jianzhong,Lu, Bin,et al. Oxidation resistance of TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy[J]. SURFACE & COATINGS TECHNOLOGY,2010,204(14):2262-2267.
APA	Kong, Lingyan.,Qi, Jianzhong.,Lu, Bin.,Yang, Rui.,Cui, Xinyu.,...&Xiong, Tianying.(2010).Oxidation resistance of TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy.SURFACE & COATINGS TECHNOLOGY,204(14),2262-2267.
MLA	Kong, Lingyan,et al."Oxidation resistance of TiAl3-Al composite coating on orthorhombic Ti2AlNb based alloy".SURFACE & COATINGS TECHNOLOGY 204.14(2010):2262-2267.