Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on a Ni-base SC superalloy subjected to high temperature

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	Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on a Ni-base SC superalloy subjected to high temperature
	M. H. Li; X. F. Sun; W. Y. Hu; H. R. Guan
	2007
发表期刊	Materials Letters
ISSN	0167-577X
卷号	61 期号:29 页码:5169-5172
摘要	Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on the Ni-base SC superalloy were investigated. Tests were conducted by exposing coated specimens both in vacuum and in still air at 1000 degrees C. XRD and SEM were used to analyze phases and microstructures. EPMA was used to characterize the distribution of elements in the coating interdiffusion layers and substrates. It was found that the as-sputtered NiCrAlY coating showed homogeneous element distribution with abrupt change of constituent at the interface between the substrate and the coating. After vacuum heat treatment, microstructural and phase changes occurred in the coating because of interdiffusion between the substrate and the coating-an interdiffusion layer and two new phases emerged. After 200 h oxidation at 1000 degrees C in air, the interdiffusion layer thickened and a diffusion influenced layer emerged below the interdiffusion layer in the substrate. Some of the Al in the gamma'-Ni3Al phase was replaced by Ta, resulting in an increase of the lattice parameter a(0) of gamma' phase. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	hunan univ, dept appl phys, changsha 410082, peoples r china. chinese acad sci, inst met res, shenyang 110016, peoples r china.;li, mh (reprint author), hunan univ, dept appl phys, changsha 410082, peoples r china;mhli2003@163.com
关键词	Sputtered Nicraly Coating Ni-base Sc Superalloy Microstructure Diffusion Thermal Barrier Coatings Oxidation Behavior
URL	查看原文
WOS记录号	WOS:000251097500024
引用统计	被引频次：17[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/321006/33642
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. H. Li,X. F. Sun,W. Y. Hu,et al. Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on a Ni-base SC superalloy subjected to high temperature[J]. Materials Letters,2007,61(29):5169-5172.
APA	M. H. Li,X. F. Sun,W. Y. Hu,&H. R. Guan.(2007).Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on a Ni-base SC superalloy subjected to high temperature.Materials Letters,61(29),5169-5172.
MLA	M. H. Li,et al."Microstructural changes and elemental diffusion of sputtered NiCrAlY coating on a Ni-base SC superalloy subjected to high temperature".Materials Letters 61.29(2007):5169-5172.