| One-Pot 합성공정으로 만든 Aluminum이 doping된 폴리카보실란으로부터 제조된 치밀한 결정화 탄화규소 섬유 |
| 신동근, 공은배, 류도형, 김영희1, 박홍식2, 김현이3 |
요업(세라믹)기술원 나노소재팀
1요업(세라믹)기술원 환경재료팀
2주식회사 데크
3서울대학교 재료공학부 |
| Dense Polycrystalline SiC Fiber Derived from Aluminum-doped Polycarbosilane by One-Pot Synthesis |
| Dong-Geun Shin, Eun-Bae Kong, Doh-Hyung Riu, Young-Hee Kim1, Hong-Sik Park2, Hyoun-Ee Kim3 |
Nano Materials Team, KICET (Korea Institute of Ceramic Engineering and Technology)
1Eco Materials Team, KICET (Korea Institute of Ceramic Engineering and Technology)
2DACC Co. Ltd
3School of Materials Science Engineering, Seoul National University |
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| ABSTRACT |
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Polyaluminocarbosilane was synthesized by direct reaction of polydimethylsilane with aluminum(III)-acetylacetonate in the presence of zeolite catalyst. A fraction of higher molecular weight polycarbosilane was formed due to the binding of aluminium acetylacetonate radicals with the polycarbosilane backbone. Small amount of Si-O-Si bond was observed in the as-prepared polyaluminocarbosilane as the result. Polyaluminocarbosilane fiber was obtained through a melt spinning and was pyrolyzed and sintered into SiC fiber from $1200{sim}2000^{circ}C$ under a controlled atmosphere. The nucleation and growth of ${beta}-SiC$ grains between $1400{sim}1600^{circ}C$ are accompanied with nano pores formation and residual carbon generation. Above $1800^{circ}C$, SiC fiber could be sintered to give a fully crystallized ${beta}-SiC$ with some ${alpha}-SiC$. |
| Key words:
Polyaluminocarbosilane, SiC fiber, Sintering, Sintering additive |
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