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J. Korean Ceram. Soc. > Volume 36(12); 1999 > Article
Journal of the Korean Ceramic Society 1999;36(12): 1390.
$Zr(Y,Ce)O_2$ TZP의 수열분위기 시효후의 기계적 성질
손영국, 박홍채
부산대학교 생산기술연구소(재료공학부)
Mechanical Properties of $Zr(Y,Ce)O_2$ TZP After Aging in Hydrothermal Conditon
Zr(Y,Ce)O2 TZP ceramics were prepared by sintering compacts of 3 mol% Y2O3-TZP(3Y-TZP) powders with different amount of 12 mol% CeO2-TZP(12Ce-TZP) in air at 140$0^{circ}C$ for 2 h. The phase changes microstructure and mechanical properties of Zr(Y. Ce)O2 TZP after hydrothermal aging(20$0^{circ}C$ 5h) were investigated. Although an addition of 12Ce-TZP accelerated the grain growth of Zr(Y, Ce)O2 TZP it restrained the transformation of tetragonal to the monoclinic phase during aging. The degradation in mechanical properties of sintered bodies was governed by the formed monoclinic phase and chemical composition. Induced Vickers indentation crack was propagated intergranually. From SEM observation of the fracture surfaces the pull-out of individual grain was confirmed.
Key words: $Zr(Y,Ce)O_2$ TZP, Microstructure, Mechanical properties, Hydrothermal aging
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