Method for making fiber-reinforced silicon nitride composites
AssigneeSouthwest Research Institute
InventorsStuart T. Schwab, Renee C. Graef, David L. Davidson
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Abstract
A method of making fiber-reinforced preceramic and ceramic composites by infiltrating a preform of heat-resistant fibers with a solvent-free thermosetting preceramic polysilazane poller. The invention also comprises the resultant preceramic and ceramic composites.
Claims6
A method of making a fiber-reinforced preceramic composite, comprising forming a preform of heat-resistant fibers, and infiltrating said preform with a liquid solvent-free perhydropolysilazane to form a preceramic composite of a shape, said perhydropolysilazane capable of being thermally transformed into silicon nitride to form a fiber-reinforced silicon nitride.
A method of making a fiber-reinforced silicon nitride ceramic composite, comprising forming a preform of heat-resistant fibers, infiltrating said preform with a liquid solvent-free thermosetting preceramic perhydropolysilazane to form a preceramic composite of a shape, said polymer capable of being thermally transformed into silicon nitride, and heating said preceramic composite in an inert atmosphere at a temperature and for a time sufficient to transform said perhydropolysilazane into a solid silicon nitride ceramic.
Dependencies are inferred from the claim text.