Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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High Temperature Tribology Behavior of 4YSZ Coatings Fabricated by Air Plasma Spray (APS) and Electron Beam Physical Vapor Deposition (EB-PVD)

플라즈마 용사 및 전자빔 물리기상 증착법으로 제조된 4YSZ 코팅의 고온마찰마모 거동

  • 양영환 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 박찬영 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 이원준 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김선주 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 이성민 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김성원 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김형태 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 오윤석 (한국세라믹기술원 이천분원 엔지니어링세라믹센터)
  • Received : 2013.12.06
  • Accepted : 2013.12.20
  • Published : 2013.12.31
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Abstract

4 mol% Yttria-stabilized zirconia (4YSZ) coatings are fabricated by Air Plasma Spray (APS) and Electron Beam Physical Vapor Deposition (EB-PVD) with top coating of thermal barrier coating (TBC). NiCrAlY based bond coat is prepared as 150 ${\mu}m$ thickness by conventional APS (Air Plasma Spray) method on the NiCrCoAl alloy substrate before deposition of top coating. Each 4YSZ top coating shows different tribological behaviors based on the inherent layer structures. 4YSZ by APS which has splat-stacked structure shows lower friction coefficient but higher wear rate than 4YSZ by EB-PVD which has columnar structure. For 4YSZ by APS, such results are expected due to the sliding wear accompanied with local delamination of splats.

Keywords

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