Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S

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	Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S
	K. Zhang; Q. M. Wang; C. Sun; F. H. Wang
	2008
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	50 期号:6 页码:1707-1715
摘要	Arc ion plating had been employed on a cobalt-base superalloy K40S to deposit a NiCrAlYSi coating to improve its oxidation resistance at 1323-1423 K in air. The K40S superalloy had poor oxidation resistance because a non-protective and easy spalling surface oxides scale mixed of Cr2O3 and CoCr2O4 was formed on its surface. After coated with NiCrAlYSi coating, a dense and protective alpha-Al2O3 scale was formed on the coating and excellently improved its oxidation resistance. Inter-diffusion obviously occurred between the coating and the substrate K40S superalloy in oxidation process, which resulted from Co atoms in K40S outwards diffused. A richen Cr and W carbides inter-diffusion layer was formed, which could acted as a diffusion barrier that barred Al atoms in coating inwards diffusion. Though the NiCrAlYSi changed into NiCoCrAlYSi during oxidation process, it still possessed a good oxidation resistance and. had a considerable long-term life. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属	[zhang, k.] shengyang normal univ, chem & life coll, shenyang 110034, peoples r china. [zhang, k.; wang, q. m.; sun, c.; wang, f. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;zhang, k (reprint author), shengyang normal univ, chem & life coll, 253 huanghe st, shenyang 110034, peoples r china;zhangke@synu.edu.cn csun@imr.ac.cn
关键词	Cobalt-base Superalloy K40s Nicralysi Coating Arc Ion Plating High Temperature Oxidation Inter-diffusion Aluminide Coatings Cyclic Oxidation Alloys
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WOS记录号	WOS:000257306400024
引用统计	被引频次：40[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/321006/33323
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Zhang,Q. M. Wang,C. Sun,et al. Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S[J]. Corrosion Science,2008,50(6):1707-1715.
APA	K. Zhang,Q. M. Wang,C. Sun,&F. H. Wang.(2008).Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S.Corrosion Science,50(6),1707-1715.
MLA	K. Zhang,et al."Preparation and oxidation behavior of NiCrAlYSi coating on a cobalt-base superalloy K40S".Corrosion Science 50.6(2008):1707-1715.