About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
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Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
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| Presentation Title |
Phase and Microstructure Study of Boron-Doped Allylvinylhydridocarbosilane Derived Bulk SiBC Ceramic |
| Author(s) |
Kathy Lu, Rahul Anand, Vempuluru Madhavi |
| On-Site Speaker (Planned) |
Kathy Lu |
| Abstract Scope |
The current study explores the formation, evolution, and thermal stability of polymer-derived SiBC at high temperatures. It focuses on the phase evolution of SiBC ceramics derived from the doping of boron in an allyl-containing polycarbosilane preceramic polymer after 1200 °C to 1600 °C pyrolysis. Different SiBC ceramic monoliths were obtained. Boron was incorporated into the carbon phase at lower pyrolysis temperatures but into both the carbon phase and the SiC lattice at high pyrolysis temperatures. B-C bonds formed in SiBC and hindered the growth of graphitic carbon and SiC. Boron improved the densification and thermal stability of the SiBC ceramics. This work provides an improved understanding of boron effects in polymer-derived SiC nanostructures at high temperatures. |