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분무건조 및 대기 플라즈마 용사에 의한 탄화규소 세라믹스용 내환경 코팅재의 제조 및 평가

Fabrication and Characterization of Environmental Barrier Coatings by Spray Drying and Atmospheric Plasma Spraying for Protection of Silicon Carbide Ceramics

  • 풍범걸 (국민대학교 기계시스템공학부 기계설계전공) ;
  • 문흥수 (세원하드페이싱 주식회사) ;
  • 곽찬원 (세원하드페이싱 주식회사) ;
  • 박지연 (원자력소재개발부 한국원자력연구원) ;
  • 이기성 (국민대학교 기계시스템공학부 기계설계전공)
  • 투고 : 2014.05.07
  • 심사 : 2014.07.21
  • 발행 : 2014.09.30

초록

Environmental barrier coatings (EBCs) are used to protect SiC-based ceramics or composites from oxidation and corrosion due to reaction with oxygen and water vapour at high temperatures above $1000^{\circ}C$. Mullite ceramics have been studied for environmental barrier coatings for Si-based ceramics. More recently, rare earth silicate ceramics have been identified as more water vapour-resistant materials than mullite for environmental barrier coatings. In this study, we fabricate mullite and yttrium silicate ceramics by an atmospheric plasma spray coating method using spherical granules fabricated by spray drying. As a result, EBCs with thicknesses in the range of $200-300{\mu}m$ are successfully fabricated without any macroscopic cracks or interfacial delamination. Phase and microstructure analysis are conducted, and the basic mechanical properties, such as hardness and indentation load-displacement curves are evaluated.

과제정보

연구 과제번호 : 고효율 제트엔진 및 마이크로 가스터빈용 고신뢰성 SiC 섬유강화 세라믹 복합소재 개발

연구 과제 주관 기관 : 한국산업기술평가관리원

참고문헌

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피인용 문헌

  1. Corrosion behavior of volcanic ash and calcium magnesium aluminosilicate on Yb2SiO5 environmental barrier coatings vol.125, pp.4, 2017, https://doi.org/10.2109/jcersj2.16211