Oxidation and phase structure of the bond coat in EB-PVD thermal barrier coatings during thermal cycling

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	Oxidation and phase structure of the bond coat in EB-PVD thermal barrier coatings during thermal cycling
	Li, MH ; Sun, XF ; Zhang, ZY ; Gong, SK ; Hu, WY ; Guan, HR ; Hu, ZQ
通讯作者	Li, MH()
	2002-01-18
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	38 期号:1 页码:79-83
摘要	After depositing Ni-30Cr-12Al-0.3Y (mass fraction, %) bond coat on a Ni base single crystal superalloy by magnetron sputtering, a ceramic top coat (7%Y2O3-ZrO2) was deposited by electron beam-physical vapor deposition (EB-PVD). During thermal cycles, the Y2O3 content in non-equilibrium phases t(')-ZrO2 decreased gradually and the t(')-ZrO2 decomposed gradually to equilibrium t-ZrO2 (transforming to monoclinic phase after cooling) and cubic ZrO2 phase. After 200 thermal cycles, the thermally grown oxides (TGO) layer with 3 mum thickness consists of Al2O3 exclusively, indicating that the sputtered Ni-Cr-Al-Y coating is suitable as bond coat for EB-PVD thermal barrier coatings. With increasing thermal cycles, a small amount of monoclinic m-ZrO2 formed from t-ZrO2. Al was depleted, and NiO and Ni(Al, Cr)(2)O-4 formed near the interface between TGO and bond coat. Stress concentration due to oxide growth and phase transformation between t-m ZrO2 would weaken the combination between top and bond coats, and then cause thermal barrier coating to spall from the substrate.
关键词	thermal barrier coating bond coat oxidation phase transformation thermal cyclic
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000173742700015
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：9[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/321006/113790
专题	中国科学院金属研究所
通讯作者	Li, MH
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Beijing 100083, Peoples R China 3.Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China
推荐引用方式 GB/T 7714	Li, MH,Sun, XF,Zhang, ZY,et al. Oxidation and phase structure of the bond coat in EB-PVD thermal barrier coatings during thermal cycling[J]. ACTA METALLURGICA SINICA,2002,38(1):79-83.
APA	Li, MH.,Sun, XF.,Zhang, ZY.,Gong, SK.,Hu, WY.,...&Hu, ZQ.(2002).Oxidation and phase structure of the bond coat in EB-PVD thermal barrier coatings during thermal cycling.ACTA METALLURGICA SINICA,38(1),79-83.
MLA	Li, MH,et al."Oxidation and phase structure of the bond coat in EB-PVD thermal barrier coatings during thermal cycling".ACTA METALLURGICA SINICA 38.1(2002):79-83.