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

文献类型：期刊论文

作者Yang, Pan1,2,4; Yang, Dongyan4; Hao, Enkang1,3; An, Yulong1,3; Li, Yuhong4; Wang, Zhiguang2
刊名SURFACE & COATINGS TECHNOLOGY
出版日期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
DOI10.1016/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.
WOS关键词FINITE-ELEMENT SIMULATION ; BARRIER COATINGS ; MECHANICAL-PROPERTIES ; RESIDUAL-STRESS ; HOT CORROSION ; CONDUCTIVITY ; MICROSTRUCTURE ; EVOLUTION ; BEHAVIOR ; 8YSZ
资助项目National Natural Science Foundation of China[11775102] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2014378]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000654045600062
出版者ELSEVIER SCIENCE SA
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
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.

入库方式： OAI收割

来源：近代物理研究所

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