| CeO2 안정화 정방정 Zirconia 다결정체(Ce-TZP)에 관한 연구(II) : Ce-TZP의 고온 기계적 성질과 파괴거동의 변화 |
| 강대석, 김문일, 박정현1, 문성환1, 백승수2 |
연세대학교 금속공학과
1연세대학교 요업공학과
2국방 과학 연구소 |
| A Study on the Ceria Stabilized Tetragonal Zirconia Polycrystals(Ce-TZP)(II) : Mechanical Properties of Ce-TZP and its Fracture Behavior at Elevated Temperature |
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| ABSTRACT |
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The high-temperature strength of Ce-TZP was measured at 200, 650 and 100$0^{circ}C$ by 4-point bending test. And its fracture behavior was observed by SEM. Below $650^{circ}C$ of the temperature, where monoclinic fraction was almost zero, the decreasing rate of bending strength was relatively slow, but above this temperature, high temperature strength was largely decreased as a result of the decrease of stress-induced transformation of zirconia. The observation of fracture surface bended at 100$0^{circ}C$ indicated that the fracture mode changed from intergranular-into transgranular-form with regardless of ceria contents. |
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