Abstract
Carbon-rich SiC fibers were prepared in a cost-effective way using in-situ chemical vapor growth upon pyrolysis of polyzirconosilane at 1200 °C under nitrogen atmosphere, with 0.5-1 μm in diameter and a few milimeters in length and a yield of about 30 %. The empirical formula of the fibers is Si1C6.6O0.1, and both silicon and carbon atoms inside the fibers are found to be uniformly distributed, and the free carbon atoms show a turbostratic state. The carbon-rich SiC fibers show ideal thermo-oxidation resistance at 1200 °C in air. Chemical vapor growth of ceramic fibers upon preceramic pyrolysis can be used to prepare high performance ceramic fibers on a large scale cost- effectively.
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Wang, M., Huang, C. & Wang, Z. In-Situ Chemical Vapor Growth of Carbon-Rich Silicon Carbide Fibers Upon Pyrolysis of Polyzirconosilane. Silicon 10, 59–65 (2018). https://doi.org/10.1007/s12633-015-9360-1
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DOI: https://doi.org/10.1007/s12633-015-9360-1