Patent ID: 7318906
Filing Date: 2008-01-15
Classification: B82Y,C04B

Abstract:
1. A method of manufacturing a SiC fiber-reinforced SiC matrix composite, comprising the steps of: providing a fiber preform composed of a SiC fiber, said SiC fiber having a quasi-stoichiometric composition and coated with one or more coatings selected from the group consisting of carbon, boron nitride and silicon carbide; preparing a slurry by mixing fine SiC powder and a sintering additive with a silicone polymer, said sintering additive selected from the group consisting of Al impregnating the fiber preform with the slurry; and hot-pressing the impregnated fiber preform at 1600° C. to 1800° C. with a pressure of between 10 MPa and 30 MPa, wherein the impregnated fiber preform is liquid-phase sintered to a SiC fiber-reinforced SiC matrix composite wherein the sintering additive and the fine SiC powder are converted to a liquid phase, resulting in promotion of the sintering reaction and densification of the SiC matrix composite.