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J. Korean Ceram. Soc. > Volume 31(5); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(5): 543.
알루미나의 고온 굽힘크리프 및 크리프 파괴
김지환, 권영삼, 김기태
포항공과대학교 기계공학과
Bending Creep and Creep Fracture of Sintered Alumina under High-Temperature
ABSTRACT
The creep behavior and creep fracture of sintered alumina at high temperature were investigated under four point flexural test. Steady-state creep behavior was observed at low bending stress and primary creep until fracture was observed at hish bending stress. The loading history of bending stress did not affect on steady-state creep rate. Intergranular fracture was dominant for fracture of alumina at room and high temperature. However, transgranular fracture was dominant on creep of alumina under high temperature by nucleation and growth of microcracks due to residual flaws or cavities in the material.
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