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Microstructure evolution and thermomechanical properties of plasma-sprayed Yb2SiO5coating during thermal aging
Zhong, Xin1,2; Niu, Yaran1; Li, Hong2; Zeng, Yi1; Zheng, Xuebin1; Ding, Chuanxian1; Sun, Jinliang2
2017
Source PublicationJournal of the American Ceramic Society
ISSN00027820
Volume100Issue:5Pages:1896-1906
AbstractRare-earth monosilicates (RE2SiO5, RE: rare-earth elements), such as Yb2SiO5, have been developed for potential application as environmental barrier coating (EBC) materials. Yb2SiO5coating would experience microstructure evolution under high-temperature environment and accordingly its thermomechanical properties would be altered. In this study, Yb2SiO5coating was fabricated by atmospheric plasma spray technique. The phase stability and microstructure change before and after thermal aging at 1300°C, 1400°C, and 1500°C were investigated. The changes in mechanical and thermal properties were characterized. The results showed that the as-sprayed coating was mainly composed of Yb2SiO5with a small amount of Yb2O3and amorphous phase. Defects in the coating, including interfaces, pores, and microcracks, were greatly reduced with grain growth after thermal treatment. Thermal aging significantly modified the thermal and mechanical properties of the coating. The average CTE was increased by 13.1%, and the hardness and elastic modulus was increased by 42.4% and 49.4%, respectively, after thermal aging at 1500°C for 50 hour. The thermal conductivity of thermal-aged coating was much higher than that of the as-sprayed coating, which was still less than 2 W/(m·K). The influence of coating microstructure on the properties was analyzed and related to the failure mechanism of EBCs. © 2017 The American Ceramic Society
DOI10.1111/jace.14690
EI Accession Number20171003425307
EI KeywordsPlasma spraying
EI Classification Number537.1 Heat Treatment Processes - 641.1 Thermodynamics - 804.2 Inorganic Compounds - 813.2 Coating Materials - 932.3 Plasma Physics - 933.1.2 Crystal Growth - 951 Materials Science
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25589
Collection中国科学院上海硅酸盐研究所
Affiliation1.Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;
2.Research Center of Composite Materials, Shanghai University, Shanghai, China
Recommended Citation
GB/T 7714
Zhong, Xin,Niu, Yaran,Li, Hong,et al. Microstructure evolution and thermomechanical properties of plasma-sprayed Yb2SiO5coating during thermal aging[J]. Journal of the American Ceramic Society,2017,100(5):1896-1906.
APA Zhong, Xin.,Niu, Yaran.,Li, Hong.,Zeng, Yi.,Zheng, Xuebin.,...&Sun, Jinliang.(2017).Microstructure evolution and thermomechanical properties of plasma-sprayed Yb2SiO5coating during thermal aging.Journal of the American Ceramic Society,100(5),1896-1906.
MLA Zhong, Xin,et al."Microstructure evolution and thermomechanical properties of plasma-sprayed Yb2SiO5coating during thermal aging".Journal of the American Ceramic Society 100.5(2017):1896-1906.
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