Patent ID: 7445095

Claim:
A brake system, comprising a friction coupling, including: organically or inorganically bound brake linings selected from at least one of the group consisting of metal-containing brake linings, sintered-metal-containing brake linings and CFC-containing brake linings; and a multilayer rotor brake disc of fiber-reinforced C/Sic ceramic composite material that includes reinforcing carbon fibers and a ceramic matrix formed of SiC and Si, said rotor brake disc including a central layer forming a support body and at least one friction layer having a surface subject to friction, both said support body and said friction layer being obtained by providing a CFC molding comprising carbon, wherein said CFC molding is reinforced with chopped fiber strands, said fibers having been coated with carbon-containing pyrolyzable organic pitches and resins subjected to firing and subsequent graphitization, and siliconizing said CFC molding by infiltrating with silicon melt, said silicon melt including further metals or metalloids as alloy constituents, said metals and metalloids being selected from the group consisting of Mo, Ni, Cr, Ti, Fe, Cu, Al, and B, and chemically reacting at least some of said carbon to form said SiC in said ceramic matrix; said support body and said at least one friction layer each having a different material composition, said at least one friction layer having a proportion of SiC of 70% to 99% and a proportion of Si of less than 20%, and said support body having a SiC content less than 65%, said at least one friction layer having a thickness greater than 0.5 mm, and wherein in said at least one friction layer a proportion by weight of 50% of said fibers have a length of less than 0.5 mm.