| 고속 구리제트에 대한 알루미나-탄화규소 복합재료의 충돌 저항물성 |
| 김창욱, 이형복 |
| 명지대학교 신소재공학과 |
| Impact Resistance of Al2O3-SiC Composites Against High Velocity Copper Jet |
| Chang-Wook Kim, Hyung-Bock Lee |
| Department of Materials Science and Engineering, Myongji University |
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| ABSTRACT |
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The mechanical properties of $Al_2O_3$-SiC composites manufactured with adding various amount and size of SiC particles have been measured and analyzed. Generally, the elastic modulus of the composites shows about 50% less than that of PL-8 (45 wt% $Al_2O_3$-51 wt% $SiO_2$-4 wt% other oxides), but the flexural strength is similar with each other. The impact resistance property of $Al_2O_3$-SiC composite against high velocity copper jet was lower than that of PL-8 when SiC particles of approximately 3 $mu$m diameter was added to. It is caused probably due to the micro-pores made by oxidation of SiC particles. However, in the case of the less-weighted $Al_2O_3$-SiC composite adding to 10 wt% SiC with average diameter of 10 $mu$m and sintering at 1200$^{circ}C$, the impact resistance property was improved up to 37 percent compared with that of PL-8. |
| Key words:
$Al_2O_3$-SiC, Impact resistance, Particle size, Sintering temperature, SiC content |
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