The oxide scale formation and evolution on detonation gun sprayed NiCrAlY coatings during isothermal oxidation

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	The oxide scale formation and evolution on detonation gun sprayed NiCrAlY coatings during isothermal oxidation
	Z. X. Chen; F. H. Yuan; Z. G. Wang; S. J. Zhu
	2007
发表期刊	Materials Transactions
ISSN	1345-9678
卷号	48 期号:10 页码:2695-2702
摘要	NiCrAlY coatings were prepared by the newly-developed detonation gun spray process. The oxide scale formation and evolution on these coatings during isothermal oxidation in air at 1100 degrees C were investigated. It was found that semi-molten particles, particle debris and pores, are present in the surface layer of the as-sprayed coating. During 100 h oxidation, the particle debris and some semi-molten particles gradually change into oxide mixture consisting of spinel, chromia and nickel oxides. However, after removal of the surface layer of the coating by a grinding treatment, a dense and single-layer alpha-Al2O3 scale forms on the surface of the coating during the oxidation. The mechanisms governing the oxide scale formation and evolution are discussed in terms of atomic diffusion and thermodynamic stability. In addition, thermogravimetric analysis showed that the oxidation rate of the ground NiCrAlY coating at 1100 degrees C is much lower than that of the as-sprayed one. The residual stress in thermally grown oxide scales was investigated using photo-stimulated luminescence spectroscopy.
部门归属	fukuoka inst technol, dept intelligent mech engn, fukuoka 8110295, japan. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zhu, sj (reprint author), fukuoka inst technol, dept intelligent mech engn, fukuoka 8110295, japan;zhu@fit.ac.jp
关键词	Nicraly Coating Oxidation Thermally Grown Oxide Detonation Gun Spray Thermal Barrier Coatings High-temperature Oxidation Bond Coatings Stress-distribution Spalling Failure Behavior Diffusion Systems Tbc Superalloy
URL	查看原文
WOS记录号	WOS:000251077900027
引用统计	被引频次：6[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/321006/33475
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. X. Chen,F. H. Yuan,Z. G. Wang,et al. The oxide scale formation and evolution on detonation gun sprayed NiCrAlY coatings during isothermal oxidation[J]. Materials Transactions,2007,48(10):2695-2702.
APA	Z. X. Chen,F. H. Yuan,Z. G. Wang,&S. J. Zhu.(2007).The oxide scale formation and evolution on detonation gun sprayed NiCrAlY coatings during isothermal oxidation.Materials Transactions,48(10),2695-2702.
MLA	Z. X. Chen,et al."The oxide scale formation and evolution on detonation gun sprayed NiCrAlY coatings during isothermal oxidation".Materials Transactions 48.10(2007):2695-2702.