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http://dx.doi.org/10.5695/JSSE.2022.55.6.376

Phase formation and microstructural characteristics of ytterbium silicates coatings fabricated by plasma spraying with Ar/He gas compositions for environmental barrier coating applications  

Choi, Jae-Hyeong (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology)
Kim, Seongwon (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology)
Kim, Ji-Yoo (Research Center of SewonHardfacing co., ltd.)
Moon, Hung Soo (Research Center of SewonHardfacing co., ltd.)
Publication Information
Journal of the Korean institute of surface engineering / v.55, no.6, 2022 , pp. 376-382 More about this Journal
Abstract
Yb2Si2O7 has a coefficient of thermal expansion similar to that of the base material of SiC and has excellent corrosion resistance in a high-temperature oxidizing atmosphere including water vapor, so it is being studied as one of the materials for environmental barrier coatings (EBCs). In this study, Yb2Si2O7 powder granule is deposited using atmospheric plasma spraying (APS) with different Ar/He ratios. Phase formation and microstructural characteristics are investigated with the coated specimens. In the coating layer, the crystallinity decreased, and the amorphous content increased from an increase in the ratio of Ar. In addition, the various types of particles involved by local volatilization of Si according to the Ar/He ratios were identified.
Keywords
Environmental barrier coatings (EBCs); $Yb_2Si_2O_7$; Phase formation; Microstructural characteristics;
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Times Cited By KSCI : 4  (Citation Analysis)
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