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1995
Conference Paper
Titel
Si-B-(N,C). A new ceramic material for high performance applications
Abstract
A new multinary, single phase (carbo-)nitride ceramic with outstanding properties has been developed. The "single-source" precursor Cl3Si-NH-BCl2 reacts with alkylamines to form a precerameric polymer which can be a liquid or a fusible or infusible solid depending on reaction conditions. Polymer pyrolysis in ammonia or nitrogen leads to amorphous Si3B3N7 and SiBN3C ceramics, respectively. The present paper reports on the physical and chemical properties of SiBN3C ceramics, with emphasis on its outstanding oxidation resistance. The resistance towards crystallization up to 1800°C enables the development of considerably improved high-performance inorganic fibers.