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Journal of the Korean Ceramic Society 1998;35(9): 939. |
| 중석이 첨가된 고분자 유기물 열분해 방법에 의한 신세라믹복합체 개발 |
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| Development of Novel Ceramic Composites by Active Filler Controlled Polymer Pyrolysis with Tungsten |
| 강건택 , 김득중 , Peter Greil 1 |
성균관대학교 공과대학 재료공학과
1University of Erlangen-Nuremberg Deop of Material Science Germany |
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| ABSTRACT |
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The formation microstructure and properties of novel ceramic composite materials by active filler con-trolled polymer pyrolysis were investigated. Polymethlsiloxane filled with W is of particular interested be-cause of the formation of ceramic bonded hard materials (WC-$W_{2}C$-$S_{1}OC$) for wear resistant applications. Highly metal-filled polymer suspensions were prepared and their conversion to ceramic composites by an-nealing in $N_{2}C$ atmosphere at 1000-$1600^{circ}C$ were studied. Dimensional change porosity and phase distribution (filler network) were analyzed and correlated to the resulting material properties. Microcrystalline com-posites with the filler reaction products embedded to the resulting material properties. Microcrystalline com-posites with the filler reaction products embedded in a silicon oxycarbide glass matrix were produced. De-pending on the pyrolysis conditions ceramic composites with a density up to 95 TD% a hardness of 7-8.8GPa Yong's modulus of 220-230 GPa a fracture toughness of 6-6.8$MPam^{1/2}$ and a flexual strength of 380-470 MPa were obtained. |
| Key words:
Ceramic hard materials, Polymer derived ceramic compoiste, Polysiloxane, Reactive filler, Tungsten carbide |
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