Oxidation resistance of TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb based alloy

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	Oxidation resistance of TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb based alloy
	L. Y. Kong; J. Z. Qi; B. Lu; R. Yang; X. Y. Cui; T. F. Li; T. Y. Xiong
	2010
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	204 期号:14 页码:2262-2267
摘要	The TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb 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 TiO(2)/AlNbO(4) mixture and intended to scale off at the TiO(2) 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 TiAl(3)-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 Al(2)O(3). The AlTi(2)N, TiAl and small amount of TiO(2) 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.
部门归属	[kong, lingyan; qi, jianzhong; lu, bin; yang, rui; cui, xinyu; li, tiefan; xiong, tianying] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;xiong, ty (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;tyxiong@imr.ac.cn
关键词	Ti-22al-26nb Tial(3)-al Coating Cold Spray High Temperature Oxidation Protection Kinetics Air
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31186
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Y. Kong,J. Z. Qi,B. Lu,et al. Oxidation resistance of TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb based alloy[J]. Surface & Coatings Technology,2010,204(14):2262-2267.
APA	L. Y. Kong.,J. Z. Qi.,B. Lu.,R. Yang.,X. Y. Cui.,...&T. Y. Xiong.(2010).Oxidation resistance of TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb based alloy.Surface & Coatings Technology,204(14),2262-2267.
MLA	L. Y. Kong,et al."Oxidation resistance of TiAl(3)-Al composite coating on orthorhombic Ti(2)AlNb based alloy".Surface & Coatings Technology 204.14(2010):2262-2267.