초록 ▼

This invention is a fiber-reinforced ceramic matrix composite and a method for their fabrication. The precursors of the ceramic matrix phase are impregnated into the fibrous preform or-applied to the surface of the fiber as fluids. The preform or fibers are then thermally processed to convert the pr

This invention is a fiber-reinforced ceramic matrix composite and a method for their fabrication. The precursors of the ceramic matrix phase are impregnated into the fibrous preform or-applied to the surface of the fiber as fluids. The preform or fibers are then thermally processed to convert the precursor compounds to the desired refractory materials, e.g., carbides, borides, or nitrides. The density and other properties of the composites may be enhanced further by using a hybrid process that combines fluid infiltration and thermal treatment with chemical vapor infiltration.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of fabricating a ceramic carbide, boride, or nitride matrix composite comprising:(a) infiltrating a porous fiber preform with a precursor composition comprising a fluid vehicle containing a non-metal-containing compound where the non-metal is selected from carb

[ What is claimed is:] [1.]1. A method of fabricating a ceramic carbide, boride, or nitride matrix composite comprising:(a) infiltrating a porous fiber preform with a precursor composition comprising a fluid vehicle containing a non-metal-containing compound where the non-metal is selected from carbon, boron and nitrogen and a metal-containing compound where the metal is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, and manganese and the metal-containing compound is decomposable to an oxide;(b) heating the preform sufficient to decompose the metal-containing compound to an oxide matrix and to evaporate at least a portion of the fluid vehicle;(c) sequentially repeating said infiltrating and heating steps; and(d) subjecting the infiltrated preform to a heat treatment sufficient to convert the oxide matrix to a matrix of a carbide, boride, or nitride compound comprising the metal and the non-metal.