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Journal of the Korean Ceramic Society 1991;28(10): 785. |
| $Al_2O_3$-33Vol.% $SiC_w$의 고온피로에 미치는 피로하중주파수의 영향 |
| 김송희 |
| 강원대학교 재료공학과 |
| Fatigue Frequency Effect of High Temperature Fatigue Fracture Behavior of $Al_2O_3$-33Vol.% $SiC_w$ |
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| ABSTRACT |
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An investigation of the crack propagation behavior of Al2O3-33Vol.% SiCw at 140$0^{circ}C$ was conducted with various loading frequencies. Higher crack propagation was observed in lower frequency and higher load ratios. Interface sliding fracture due to glassy phase from the oxidation of SiCw and cavitation along grain boundary of diffusional creep appeared to be the main mechanism of fatigue fracture in slower crack propagation while interface sliding and whisker pull out aided by glassy phase formation played main role of fatigue fracture for higher crack growth condition. The frequency effect on deformation behavior was discussed with a Maxwell model. |
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