Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Hydrothermal Stability of Zirconia Ceramics

지르코니아 세라믹의 열수 상 안정성

  • Lee, Deuk-Yong (Department of Materials Engineering, Daelim College of Technology) ;
  • Gogotsi, George A. (Institute for Problems of Strength, National Academy of Sciences of Ukraine) ;
  • Kim, Dae-Joon (Multifunctional Ceramics Research Center, KIST) ;
  • Park, No-Jin (Department of Materials Engineering, Kumho National University of Technology)
  • 이득용 (대림대학 재료정보공학과) ;
  • ;
  • 김대준 (한국과학기술연구원 복합기능세라믹센터) ;
  • 박노진 (금오공과대학교 재료공학과)
  • Published : 2002.01.01
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Abstract

3mol% $Y_2O_3$ Partially-Stabilized Zirconia single Crystals (PSZCs) containing a small quantity (<0.5%) of rare-earth oxides ($CeO_2,\;Tb_2O_3$) were prepared by using a direct high-frequency skull melting technique to evaluate hydrothermal stability in an autoclave. Pole exhibited no $t{\rightarrow}m$ phase transformation during aging for 5h at temperatures from 150 to 250$^{\circ}C$ and 4MPa water vapor pressure in an autoclave, resulting in excellent hydrothermal stability.

3Y-TZP에 희토류 산화물($CeO_2,\;Tb_2O_3$)을 0.5% 이하로 첨가시킨 지르코니아 단결정을 skull melting법으로 제조하여 오토클레이브 하에서 열수 상 안정성을 조사하였다. 극점도 측정결과, skull melting 법으로 제조한 $CeO_2$와 $Tb_2O_3$가 첨가된 시편들은 단결정이었으며 150∼250$^{\circ}C$에서 5시간 수증기 분위기 하에서 열처리한 후에도 정방정 상이 유지되는 우수한 열수 상 안정성이 관찰되었다.

Keywords

References

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