| Si-SiC-Graphite 복합재료의 기계적 물성과 마찰 마모 특성 |
| 김인섭, 이병하 |
| 명지대학교 공과대학 무기재료공학과 |
| Mechanical and Tribological Properties of Si-SiC-Graphite Composites |
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| ABSTRACT |
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Si-SiC-graphite composites were developed by incorporating solid lubricant graphite into Si-SiC, in the light of improving tribological properties of Si-SiC ceramics. Si-SiC-graphite composites were fabricated by infilterating silicon melt into the mixture of α-SiC, carbon black and graphite powder at 1750℃ under 3 Torr. The particle size of graphite was in the range of 150 to 500㎛, and the loading content of graphite was 0, 20, 25, 30, 35 vol% in the mixture of α-SiC and carbon black. The mechanical and tribological properties of this composites were studied. The density, hardness, flexural strength, compressive strength and Young's modulus were decreased with increasing of graphite content. An additiion of solid-lubricant graphite up to 30 vol% has improved tribological properties of Si-SiC ceramics without considerable degradation of mechanical properties. |
| Key words:
Si-SiC-graphite, Composite, Lubricant graphite, Tribological properties |
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