| 반응결합에 의해 제조된 ZTA복합체의 기계적 특성 |
| 장복기, 백용혁, 문종하, 이종호 |
| 전남대학교 무기재료공학과 |
| Mechanical Properties of ZTA Composites Fabricated by Reaction Bonding |
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| ABSTRACT |
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The mechanical properties of Al2O3-ZrO2 composites fabricated by RBAO(reaction bonded aluminium oxide) process were investigated. As the amount of ZrO2 increased the sinstered density of Al2O3-ZrO2 composites decreased slightly, but wear resistance was enhanced. Bending strength of Al2O3-ZrO2 composites increased in proportion to the amount of al in case of a fixed ZrO2 content. When the amount of Al was fixed bending strength reached its maximum value at 25 wt% ZrO2. The fracture toughness(K1c) increased with increasing content of ZrO2, but decreased with increasing Al amount. On the other hand, the fracture mode of Al2O3-ZrO2 composites was the mixed mode of inter-and transgranular fracture. |
| Key words:
$Al_2O_3-ZrO_2$ composite, RBAO process, Bending strengtly, Wear resistance, $K_{1c}$, Fracture mode |
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