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J. Korean Ceram. Soc. > Volume 41(2); 2004 > Article
Journal of the Korean Ceramic Society 2004;41(2): 111.
doi: https://doi.org/10.4191/kcers.2004.41.2.111
알루미나가 첨가된 Yttria 안정화 Tetragonal Zirconia Polycrystals 소결체의 특성
양성구, 정재욱1, 강종봉2
경남대학교 공동기기센터(대학원 재료공학과)
1경남대학교 대학원 재료공학과
2경남대학교신소재공학부
Characteristics of Sintered Yttria Stabilized Tetragonal Zirconia Polycrystals(3Y-TZP) with Alumina
ABSTRACT
3Y-TZP containing 0.3∼1.2 wt% of $Al_2$O$_3$ was prepared by slip-casting after attrition milling. The specimen was sintered at 1390∼151$0^{circ}C$ and mechanical characterization and microstructure analysis were conducted. Monoclinic content of the specimen was calculated by XRD. The apparent density of specimen increased with increasing sintering temperature. While above 1470%, the formation of m-ZrO$_2$ degraded the density. The microhardness of specimen decreased with temperature because monoclinic phase increased wit the grain growth. The specimen containing $Al_2$O$_3$ below 0.9 wt% sintered at 143$0^{circ}C$ showed the highest microhardness of 1360 Hv.
Key words: Zirconia, 3Y-TZP, Phase transformation, m-$ZrO_2$
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