Multilayer ceramic composite

摘要

Multilayered ceramic composite comprises composite material(s) forming supporting zone (SZ) and having oxidation-sensitive reinforcing fibers, ceramic surface layer(s) (CL) having reinforcing fibers and protective layer(s) (PL). PL is disposed between SZ and CL, and has additives whose oxides are glasses having m.pt of at most 1250 degrees C. Composite material and CL each have matrix and phases of specific material. Multilayered ceramic composite comprises composite material(s) forming supporting zone and containing oxidation-sensitive reinforcing fibers, ceramic surface layer(s) having reinforcing fibers, and protective layer(s) (PL). The composite material and ceramic surface layer each includes a matrix containing mass proportion(s) of at least 25% silicon carbide, further phases selected from phases having silicon and phases having silicon alloys, and carbon chosen from carbon in elemental form and a carbon compound. PL has a matrix composed of component(s) of the matrix of supporting zone or ceramic surface layer. PL is disposed between supporting zone and ceramic surface layer. PL contains additives whose oxides are low melting point glasses having melting point of at most 1250 degrees C. Independent claims are included for the following: (1) production of multilayered ceramic composite which involves bonding carbon-containing fiber-reinforced precursor forming supporting zone to carbon-containing precursor forming surface layer surface wide using an adhesive composition to form bonded article, pyrolyzing bonded article for forming a carbon-containing multilayered composite infiltrated with silicon or silicon alloys, and reacting portion(s) of carbon with silicon to form silicon carbide. Adhesive composition during pyrolysis produces a porous, carbon-containing layer. Adhesive composition contains glass-forming additives chosen from admixtures of high melting point elements, binary compounds and multinary compounds having melting point of at least 1450 degrees C. Glass forming additive produces low melting point glasses having melting point of at most 1250 degrees C by oxidation; and (2) method of using a multilayered ceramic composite for forming brake discs, clutch discs and brake linings.