Phase transformation and bond coat oxidation behavior of EB-PVD thermal barrier coating

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	Phase transformation and bond coat oxidation behavior of EB-PVD thermal barrier coating
	M. H. Li; X. F. Sun; S. K. Gong; Z. Y. Zhang; H. R. Guan; Z. Q. Hu
	2004
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	176 期号:2 页码:209-214
摘要	Thermal barrier coating, consisting of an electron beam physical vapor deposited partially stabilized zirconia (PSZ, 7 wt.%Y2O3) and a sputtered NiCrAlY bond coat, was investigated by thermal cycling at 1050 degreesC in air. Experimental characterization was conducted using X-ray diffraction analysis and scanning electron microscopy equipped with energy dispersive analytical Xray spectroscopy The lattice parameters of the tetragonal phase were determined as a function of thermal cycles. It was found that the c/a ratio increases with thermal cycling, correspondingly to a decrease in the content of Y2O3 of the tetragonal phase. The nonequilibrium tetragonal phase (T') of the PSZ slowly decomposed to tetragonal phase with relatively low Y2O3 content and cubic phase. After 300 cycles small amount of monoclinic phase was observed, which resulted from the tetragonal to monoclinic phase transformation during cooling. AI,03 formed preferentially along the bond and top coat interface. After 200 cycles the thermally grown oxide (TGO) was very thin and consisted of only Al2O3. With Al-depletion in the bond coat, internal oxidation occurred and some other oxides such as NiO and Ni(Cr,Al)(2)O-4 spinels were observed in the TGO near the bond coat. (C) 2003 Elsevier Science B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china. beijing univ aeronaut & astronaut, coll mat sci & engn, beijing 100083, peoples r china.;li, mh (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Thermal Barrier Coating Electron Beam Physical Vapor Deposition Bond Coat Oxidation Phase Transformation Partially-stabilized Zirconia System
URL	查看原文
WOS记录号	WOS:000187750800011
引用统计	被引频次：21[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/321006/35411
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,S. K. Gong,et al. Phase transformation and bond coat oxidation behavior of EB-PVD thermal barrier coating[J]. Surface & Coatings Technology,2004,176(2):209-214.
APA	M. H. Li,X. F. Sun,S. K. Gong,Z. Y. Zhang,H. R. Guan,&Z. Q. Hu.(2004).Phase transformation and bond coat oxidation behavior of EB-PVD thermal barrier coating.Surface & Coatings Technology,176(2),209-214.
MLA	M. H. Li,et al."Phase transformation and bond coat oxidation behavior of EB-PVD thermal barrier coating".Surface & Coatings Technology 176.2(2004):209-214.