초록

A fiber- and filament-containing ceramic preform comprises of a mixture of discontinuous fibers and particulates surrounding a layer of continuous filaments extending substantially through the mixture is procduced and infiltrated with a molten ceramic to produce a composite.

대표청구항 ▼

A process for producing a slip-cast compact comprised of a mixture of fibers and particulates surrounding a layer of continuous filaments which comprises preparing a slip comprised of ceramic material suspended in a liquid, vehicle, said ceramic material being comprised of a mixture of fibers and pa

A process for producing a slip-cast compact comprised of a mixture of fibers and particulates surrounding a layer of continuous filaments which comprises preparing a slip comprised of ceramic material suspended in a liquid, vehicle, said ceramic material being comprised of a mixture of fibers and particulates, said fibers being discontinuous and having an aspect ratio ranging from about 10 to less than about 200, said particulates having an equivalent diameter ranging from greater than about 0.2m3m1:5 to about 1:1, at least about 90% by volume of said particulates being filler particulates, said ceramic material being present in an amount greater than about 4% by volume of said slip, said ceramic fibers being present in an amount greater than about 2% by volume of said slip, providing a porous mold, depositing a portion of said slip on a surface of the mold whereby sufficient liquid vehicle is extracted to produce a first layer of said compact, depositing a layer of a plurality of continuous filaments on said first layer of compact with said filaments being positioned substantially parallel to each other and extending at least substantially across said first layer of compact, said filaments having a melting or decomposition point above 1000°C., depositing a sufficient amount of said slip on said filaments whereby sufficient liquid vehicle is extracted forming a ceramic layer sufficient to cover said filaments and produce said compact, said filaments having been maintained substantially in said position, said fibers and filler particulates being selected from the group consisting of aluminum oxide, beryllium oxide, silicon carbide, silicon nitride, titanium carbide, titanium diboride, zirconium carbide, zirconium diboride and a mixture thereof, from 0 to about 10% by volume of said particulates being comprised of a ceramic meltable material which has a melting point ranging from a minimum of about 1000°C. to a maximum which is about 100°C. below the melting or decomposition point of said fibers, filler particulates and filaments and in its molten state wets said fibers, filler particulates and filaments.