초록 ▼

The invention provides a fiber-reinforced composite ceramic containing high-temperature-resistant fibers, in particular fibres based on Si/C/B/N, which are reaction-bonded to a matrix based on Si, which is produced by impregnating fiber bundles of Si/C/B/N fibers with a binder suitable for pyrolysis

The invention provides a fiber-reinforced composite ceramic containing high-temperature-resistant fibers, in particular fibres based on Si/C/B/N, which are reaction-bonded to a matrix based on Si, which is produced by impregnating fiber bundles of Si/C/B/N fibers with a binder suitable for pyrolysis and solidifying the binder, if desired subsequently conditioning the fiber bundles with an antisilicization layer suitable for pyrolysis, for example phenolic resin or polycarbosilane, subsequently preparing a mixture of fiber bundles, fillers such as SiC and carbon in the form of graphite or carbon black and binders, pressing the mixture to produce a green body and subsequently pyrolysing the latter under reduced pressure or protective gas to produce a porous shaped body which is then infiltrated, preferably under reduced pressure, with a silicon melt. This makes it possible to produce, in an efficient manner suitable for mass production, fiber-reinforced composite ceramics which have significantly improved properties compared with conventional composite ceramics and, in particular, are suitable for use in high-performance brake systems (FIG. 1).

대표청구항 ▼

[ What is claimed is:] [1.]1. A process for making a fibre-reinforced composite ceramic comprising high-temperature-resistant fibres reaction-bonded to a matrix including silicon, comprising the following:bundling individual fibers into a fibre bundle;impregnating the fibre bundle with a first binde

[ What is claimed is:] [1.]1. A process for making a fibre-reinforced composite ceramic comprising high-temperature-resistant fibres reaction-bonded to a matrix including silicon, comprising the following:bundling individual fibers into a fibre bundle;impregnating the fibre bundle with a first binder suitable for pyrolysis;drying the impregnated fibre bundle;preparing of a mixture of the impregnated fibre bundle, a first filler and a second binder;pressing of the mixture to produce a green body;pyrolysing the green body under reduced pressure or protective gas to produce a porous fibre-reinforced shaped carbon body; andinfiltrating the porous shaped body with a silicon melt.