Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Phase formation and microstructural characteristics of ytterbium silicates coatings fabricated by plasma spraying with Ar/He gas compositions for environmental barrier coating applications

플라즈마용사로 증착된 환경차폐코팅 이터븀 실리케이트의 Ar/He 가스 조성에 따른 상형성 및 미세구조 특성

  • 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.)
  • 최재형 (한국세라믹기술원 이천분원 엔지니어링소재센터) ;
  • 김성원 (한국세라믹기술원 이천분원 엔지니어링소재센터) ;
  • 김지유 ((주)세원하드페이싱 연구소) ;
  • 문흥수 ((주)세원하드페이싱 연구소)
  • Received : 2022.11.08
  • Accepted : 2022.12.14
  • Published : 2022.12.31
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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

Acknowledgement

This work was supported by the Technology Innovation Program (SiC fiber reinforced ceramic composite improved environmental performance developed ceramic coating layer, No. 20011237) funded by the Ministry of Trade, Industry & Energy (MOTIE).

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