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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
发表期刊Journal of the American Ceramic Society
ISSN00027820
卷号100期号:5页码:1896-1906
摘要Rare-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入藏号20171003425307
EI主题词Plasma spraying
EI分类号537.1 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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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.sic.ac.cn/handle/331005/25589
专题中国科学院上海硅酸盐研究所
作者单位1.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
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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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