CARBON FIBER REINFORCED SILICON NITRIDE BASED NANOCOMPOSITE MATERIAL AND METHOD FOR PREPARING SAME

摘要

An impregnation liquid is prepared by mixing a powder of silicon nitride (or alumina thereon), a mixed powder containing ultrafine silicon carbide, and a solution containing a preceramic polymer containing silicon and nitrogen, and the carbon fibers in the impregnation liquid. The impregnated liquid is uniformly impregnated with the carbon fiber by successive passage, and the impregnated carbon fiber aggregate is cut and laminated to form an arbitrary shape, and fired in an inert atmosphere to prepare a carbon fiber reinforced silicon nitride nanocomposite. .;The nanocomposite matrix reinforcement, fine particle dispersion reinforcement, and carbon filament reinforcement are thermally decomposed using preceramic polymer to realize a simple process by high temperature firing to obtain a super-strength and super-toughness composite material.