Patent ID: 6818085
Filing Date: 2004-11-16
Classification: C04B,F16D

Abstract:
A process for producing a fiber-reinforced, ceramic structural component comprising high-temperature resistant fibers based on carbon, which are reaction-bonded to a matrix of silicon carbide (SiC), comprising the steps of:coating bundles of fibers with pyrolysable binder and solidifying the binder; producing a mixture of said coated fiber bundles, fillers and binders; pressing the mixture in a press mold to produce a pressed body; pyrolysing the pressed body in the absence of oxygen to form a porous, carbon-containing preform; and infiltrating the preform with a silicon melt to form a silicon carbide matrix; wherein various mixtures are produced, which contain fibers of at least one of different quality or different amounts, with or without coatings; wherein during filling of the press mold, the press mold is provided with separating means and the mixtures are arranged in regions which extend in different spatial directions in the press mold; wherein the regions produced in this way are retained in the preform after the pressing and crosslinking; and wherein as a result of the infiltration of the preform with silicon, component regions of high ductility and component regions of high resistance to oxidation are present in the structural component.