Low Temperature Degradation Behavior for CaO Doped 2.5Y-TZP Ceramics

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J. Korean Ceram. Soc. > Volume 29(5); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(5): 341.

CaO를 첨가한 2.5Y-TZP 세라믹스의 저온열화 거동

박정현, 이한주, 문성환, 박한수¹

연세대학교 요업공학과
¹홍익공전 요업과

Low Temperature Degradation Behavior for CaO Doped 2.5Y-TZP Ceramics

ABSTRACT

The effects of CaO addition on the low temperature degradation behavior of 2.5Y-TZP ceramics were investigated. Y2O3-CaO-ZrO2 ceramics were prepared from the commercial Y-TZP powder added within 1 mol% of CaO. Fully tetragonal phase could be obtained at each composition under sintering condition of 1500$^{circ}C$ for 1 hour. As the amount of CaO increased, grain size was decreased. From the result of heat treatment at 200$^{circ}C$, volume fraction of monoclinic phase formed on the surface of each specimen was decreased with higher CaO amount. Stability of tetragonal ZrO2 phase for low temperature heat treatment was increased by CaO addition without the degradation of mechanical properties.