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Journal of the Korean Ceramic Society 1993;30(8): 651. |
$Al_2O_3$로 코팅된 Y-TZP 분말의 등온 상전이 거동 |
이종국, 양권승 |
조선대학교 재료공학과 |
Isothermal Phase Transformation Beahviors in $Al_2O_3$ Coated Y-TZP Powders |
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ABSTRACT |
Granulated Y-TZP powders were coated by using Sol-Gel method and the coating effect of Al2O3 on the isothermal phase transformation in Al2O3 coated Y-TZP powders was investigated. During aging, tetragonal phase in Y-TZP powder were isothermally transformed to monoclinic, but the tetragonal phase in Al2O3 coated Y-TZP powders was continuously retained in spite of long aging. It can be considered that the improvement of thermal stability of tetragonal phase in Al2O3 coated Y-TZP powders may be due to the increase of constraint effect near tetragonal phase, and the suppression of surface transformation by obstructing the reaction between the surface of Y-TZP and H2O. |
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