Abstract: This invention relates to a process for the production of a shaped composite material and the material obtained through that process. In particular it relates to a process for obtaining a disk of composite ceramic material for disc brakes in which the friction coefficient is varied by varying the composition of the surface layer.

Abstract: A method for making a composite structure or a portion of a composite structure of a braking band of a brake disc, unusually capable of obtaining a structure with an especially long life, comprising at least the following steps: making a composite ceramic structure, comprising carbon fibre filaments, silicon and silicon carbides, obtaining a body of a braking band comprising at least one braking surface; processing said braking surface removing a surface layer so as to have carbon not bonded with the silicon on surface; removing at least partly the carbon not bonded with silicon from the surface; depositing an anchoring substrate on said braking surface; and depositing a protective coating on said anchoring substrate.

Abstract: This invention relates to a process for the production of a shaped composite material and the material obtained through that process. In particular it relates to a process for obtaining a disk of composite ceramic material for disc brakes in which the friction coefficient is varied by varying the composition of the surface layer.

Abstract: The present invention relates to a disc for disc brakes, comprising a support and a braking band suitable to cooperate with brake calipers in order to exert a braking action on a vehicle, said braking band comprising a shaped body extending around a symmetry axis and being laterally defined by braking surfaces, said braking band being made of composite material which can be obtained by the interaction of a mixture, comprising filament rovings, essentially consisting of carbon, which are randomly arranged and have sizes which are not greater than 30 mm, with silicon at a temperature sufficient to cause the melting of said silicon, characterized in that it comprises at least one strengthening ring in carbon-carbon material located near or at the cracking point.