Investigation on hot-fatigue behaviors of gradient thermal barrier coatings by EB-PVD

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	Investigation on hot-fatigue behaviors of gradient thermal barrier coatings by EB-PVD
	H. B. Guo; S. K. Gong; C. G. Zhou; H. B. Xu
	2001
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	148 期号:2-3 页码:110-116
摘要	Gradient thermal barrier coatings (GTBCs) have been produced by co-deposition of a tablet of mixtures of Al-Al2O3-ZrO2-8wt.%Y2O3 and an ZrO2-8wt.%Y2O3 ingot onto NiCoCrAlY bond coat by means of EB-PVD. Thermal cycling tests at 1323 K were conducted to evaluate the hot-fatigue behaviors of the coating. The microstructure and composition distribution of the coating- was studied by SEM with EDS, and constituent phases identified by XRD. It was found that the gradient structure significantly increased the lifetime of the coating. Due to the selective oxidation of Al in the NiCoCrAlY bond coat and a Ni3Al film on the surface of the bond coat, an Al2O3 layer was developed between the bond coat and the transition layer. Failure of the gradient coating eventually occurred by cracking near the interface between the Al2O3 and transition layer. In addition, Compared with that before the test, the gradient coating after thermal cycling tests becoming softer than that before the test. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	beijing univ aeronaut & astronaut, dept mat sci & engn, beijing 100083, peoples r china. state key lab corros & protect, shenyang, peoples r china.;xu, hb (reprint author), beijing univ aeronaut & astronaut, dept mat sci & engn, beijing 100083, peoples r china
关键词	Gradient Thermal Barrier Coatings (Gtbcs) Electron Beam Physical Vapor Deposition (Eb-pvd) Thermal Cycling Gas-turbine Failure
URL	查看原文
WOS记录号	WOS:000172875400002
引用统计	被引频次：44[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/321006/36651
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. B. Guo,S. K. Gong,C. G. Zhou,et al. Investigation on hot-fatigue behaviors of gradient thermal barrier coatings by EB-PVD[J]. Surface & Coatings Technology,2001,148(2-3):110-116.
APA	H. B. Guo,S. K. Gong,C. G. Zhou,&H. B. Xu.(2001).Investigation on hot-fatigue behaviors of gradient thermal barrier coatings by EB-PVD.Surface & Coatings Technology,148(2-3),110-116.
MLA	H. B. Guo,et al."Investigation on hot-fatigue behaviors of gradient thermal barrier coatings by EB-PVD".Surface & Coatings Technology 148.2-3(2001):110-116.