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Fabrication and Characteristics of Yttria-stabilized Zirconia (7.5 wt% Y2O3-ZrO2) Coating Deposited via Suspension Plasma Spray

서스펜션 플라즈마 용사를 이용한 이트리아 안정화 지르코니아 (7.5 wt% Y2O3-ZrO2) 코팅 증착 및 특성

  • Lee, Won-Jun (Engineering Ceramic Center, Korea Institute of Ceramic & Engineering Technology) ;
  • Kwon, Chang-Sup (Engineering Ceramic Center, Korea Institute of Ceramic & Engineering Technology) ;
  • Kim, Seongwon (Engineering Ceramic Center, Korea Institute of Ceramic & Engineering Technology) ;
  • Oh, Yoon-Suk (Engineering Ceramic Center, Korea Institute of Ceramic & Engineering Technology) ;
  • Kim, Hyung-Tae (Engineering Ceramic Center, Korea Institute of Ceramic & Engineering Technology) ;
  • Lim, Dae-Soon (Department of Materials Science and Engineering, Korea University)
  • 이원준 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 권창섭 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김성원 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 오윤석 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김형태 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 임대순 (고려대학교 신소재공학과)
  • Received : 2013.11.19
  • Accepted : 2013.12.16
  • Published : 2013.12.28

Abstract

Yttria-stabilized zirconia (YSZ) coatings are fabricated via suspension plasma spray (SPS) for thermal barrier applications. Three different suspension sets are prepared by using a planetary mill as well as ball mill in order to examine the effect of starting suspension on the phase evolution and the microstructure of SPS prepared coatings. In the case of planetary-milled commercial YSZ powder, a deposited thick coating turns out to have a dense, vertically-cracked microstructure. In addition, a dense YSZ coating with fully developed phase can be obtained via suspension plasma spray with suspension from planetary-milled mixture of $Y_2O_3$ and $ZrO_2$.

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