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Journal of the Korean Ceramic Society 1998;35(12): 1294. |
CeO$_2$ 도핑에 의한 불규칙 입자형상의 이트리아 안정화 지르코니아 제조 |
이종국, 강현희, 김영정1, 김환2 |
조선대학교 재료공학과 1선문대학교 재료공학과 2서울대학교 재료공학부 |
Preparation of Yttria-stabilized Zirconia with Irregular Grain Shapes by Ceria Doping |
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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. |
Key words:
Yttria-stabilized zirconia, Irregular grain shapes, Ceria doping |
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