Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Yttria-stabilized Zirconia with Irregular Grain Shapes by Ceria Doping

CeO$_2$ 도핑에 의한 불규칙 입자형상의 이트리아 안정화 지르코니아 제조

  • Lee, Jong-Kook (Department of Materials, Chosun University) ;
  • Kang, Hyun-Hee (Department of Materials, Chosun University) ;
  • Kim, Young-J. (Department of Engineering, Sunmoon University) ;
  • Kim, Hwan (Division of Materials Engineering, Seoul National University)
  • 이종국 (조선대학교 재료공학과) ;
  • 강현희 (조선대학교 재료공학과) ;
  • 김영정 (선문대학교 재료공학과) ;
  • 김환 (서울대학교 재료공학부)
  • Published : 1998.12.01
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Abstract

Yttria-stabilized zirconia ceramics with irregular grain shapes and curved grain boundaries was prepared by ceria doping. The amount of ceria doped into zirconia compacts by a dipping method were at range of 2 to 20 mol% Irregular grain shapes and curved grain boundaries were formed only inspecimens doped with more than 8mol% cerial. Ceria-doped specimens showed large grain size and low sintered density compared with pure yttria-stabilized zirconia which was due to the increase in the contents of stabilizer and cubic phase. The amount of doped ceria was larger on the surface than the inside regions and therefore mi-crostructure and phase on the surface were different from those in the inside regions. Transgranular frac-ture mode was observed ion ceria doped specimens due to irregular large grain sizes.

Keywords

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