| Effect of Additive Composition on Fracture Toughness of In Situ-Toughened SiC−Si3N4 Composites |
| Young-Il Lee, Young-Wook Kim1 |
Department of Materials Science and Engineering, The University of Seoul
1Department of Optometry and Vision Science, Dongnam Health College |
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| ABSTRACT |
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Effect of additive composition on fracture toughness of in situ-toughened $SiC-Si_3N_4$ composites was investigated for five different additive compositions. The highest toughness $(6.4MPa{cdot}m^{1/2});in;SiC-Si_3N_4$ composites investigated herein was obtained when an Y-Mg-Si-Al-O-N oxynitride glass was used as a sintering additive. The improvement in fracture toughness was produced by enhanced bridging and deflection by $Si_3N_4$ grains. |
| Key words:
Composite, Silicon carbide, Silicon nitride, Additive composition, Fracture toughness |
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