| 摘要 |
PURPOSE:To obtain the title fiber-reinforced ceramic composite material with remarkably improved fracture toughness and flexural strength by reinforcing a fiber-reinforced ceramic composite material further with dispersed particles. CONSTITUTION:An organometallic polymer such as polysiloxane and polysilazane is dissolved in a solvent such as toluene, and ceramic particles to be used as a matrix are mixed into the soln. A fiber is then continuously passed through a liq. impregnant consisting of the liq. mixture to uniformly deposit the impregnant on the fiber surface by the filament winding method. In this case, the amt. of the fiber to be dispersed in the ceramic is preferably controlled to about 30-40%. The material wound by the filament winding method is heated to 700-800 deg.C in gaseous N2, etc., to make the organometallic polymer infusible. As a result, a vitrified ceramic layer of fine particles is formed on the surface of the ceramic particle to be used as the matrix as the preceding stage. The obtained laminated body is then sintered under pressure in gaseous Ar or gaseous N2 to obtain a fiber-reinforced ceramic composite material reinforced with dispersed particles. |
