Thermal shock resistance and failure analysis of La-2(Zr0.75Ce0.25)(2)O-7-based TBCs produced by atmospheric plasma spraying

doi:10.1016/j.surfcoat.2021.126903

	Thermal shock resistance and failure analysis of La-2(Zr0.75Ce0.25)(2)O-7-based TBCs produced by atmospheric plasma spraying
	Yang, Pan 1,2,4; Yang, Dongyan 4; Hao, Enkang 1,3; An, Yulong 1,3; Li, Yuhong 4; Wang, Zhiguang 2
刊名	SURFACE & COATINGS TECHNOLOGY
	2021-03-15
卷号	409 页码:10
关键词	La-2(Zr0.75Ce0.25)(2)O-7 High-temperature TBC Thermal shock resistance Failure mechanism Water cooling Air cooling
ISSN号	0257-8972
DOI	10.1016/j.surfcoat.2021.126903
通讯作者	An, Yulong(csuayl@sohu.com) ; Li, Yuhong(liyuhong@lzu.edu.cn)
英文摘要	High-temperature thermal barrier coatings (TBCs) have important application prospects in the high-performance gas turbine. It is of great significance to study the thermal shock behaviors in improving the reliability and durability of TBCs. In this study, three groups of high-temperature La-2(Zr0.75Ce0.25)(2)O-7 (LCZ)-based coatings (LCZ, LCZ/8YSZ and LCZ/CYSZ) were designed and produced by atmospheric plasma spraying. Two cooling ways, water cooling and air cooling, were employed to conduct the thermal shock tests, which facilitates a comprehensive understanding of the thermal shock resistance and the failure mechanisms of LCZ-based TBCs in cyclic thermal shocks. The thermal shock resistance of these coatings was evaluated by thermal cycling lifetime and the failure mechanisms were analyzed in the framework of crack initiation and propagation. Based on the present results, LCZ/8YSZ coating remains intact after 100 air-cooled thermal shock cycles, indicative of remarkable thermal shock resistance. The initiation and propagation of transverse cracks at the interface between the ceramic layer and bond coat result in interface debonding, which is the only failure mechanism of these coatings in air-cooled thermal shock. Except for the interface debonding, in water-cooled thermal shock, the spalling of top coat is another failure mechanism due to the intersection of vertical cracks and interlayer microcracks. The main reasons for the growth of these cracks were also discussed and analyzed in detail.
资助项目	National Natural Science Foundation of China[11775102] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2014378]
WOS关键词	FINITE-ELEMENT SIMULATION ; BARRIER COATINGS ; MECHANICAL-PROPERTIES ; RESIDUAL-STRESS ; HOT CORROSION ; CONDUCTIVITY ; MICROSTRUCTURE ; EVOLUTION ; BEHAVIOR ; 8YSZ
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000654045600062
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137247]
专题	中国科学院近代物理研究所
通讯作者	An, Yulong; Li, Yuhong
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 4.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yang, Pan,Yang, Dongyan,Hao, Enkang,et al. Thermal shock resistance and failure analysis of La-2(Zr0.75Ce0.25)(2)O-7-based TBCs produced by atmospheric plasma spraying[J]. SURFACE & COATINGS TECHNOLOGY,2021,409:10.
APA	Yang, Pan,Yang, Dongyan,Hao, Enkang,An, Yulong,Li, Yuhong,&Wang, Zhiguang.(2021).Thermal shock resistance and failure analysis of La-2(Zr0.75Ce0.25)(2)O-7-based TBCs produced by atmospheric plasma spraying.SURFACE & COATINGS TECHNOLOGY,409,10.
MLA	Yang, Pan,et al."Thermal shock resistance and failure analysis of La-2(Zr0.75Ce0.25)(2)O-7-based TBCs produced by atmospheric plasma spraying".SURFACE & COATINGS TECHNOLOGY 409(2021):10.