| 상압소결 Si3N4-TiN 복합재료의 기계적성질 |
| 송진수, 손용배, 김종희 |
| 한국과학기술원 재료공학과 |
| Mechanical Properties of the Pressureless Sintered Si3N4-TiN Ceramic Composities |
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| ABSTRACT |
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Si3N4-TiN electro-conductive ceramic composites with 7wt% Al2O3＋3wt% Y2O3 or 5wt% MgO as sintering aids were fabricated by pressureless sintering at 1,80$0^{circ}C$ for 1h. The 3pt. flexural strength, KIC and Vickers hardness were measrued in order to investigate the effects of TiN on the mechanical properties. Also oxidation behavior was observed by measuring the weight gain after exposure to air at 1,10$0^{circ}C$ for 100h. the reaction products between Si3N4 and TiN was not detected by XRD and EDS. Mechanical properties of the composites were not influenced by the addition of TiN less than 30vol%, but oxidation resistance of the composites was rapidly decreased with the amount of added TiN. |
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