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    • 2. 发明申请
    • PREFORM FOR MAKING A COMPONENT OF A BRAKING SYSTEM
    • WO2019025966A1
    • 2019-02-07
    • PCT/IB2018/055722
    • 2018-07-31
    • FRENI BREMBO S.P.A.
    • CAVALLI, LorenzoMENAPACE, Luca
    • F16D69/02
    • The invention relates to a preform for making a component of a braking system, consisting of a fibre- reinforced ceramic composite material, obtained by forming and subsequent pyrolysis of a pre-preg. Such pre-preg comprises a fibrous mass impregnated with a polymeric binder composition based on one or more resins selected from the group consisting of siloxane resins and silsesquioxane resins and can optionally comprise one or more organic resins. Siloxane resins comprise polysiloxanes and silsesquioxane resins comprise polysilsesquioxanes. The aforesaid polymeric binder composition appears as a liquid having a viscosity from 55000 to 10000 mPas at temperatures from 50°C to 70°C. The fibre-reinforced composite ceramic material comprises a ceramic or partially ceramic matrix, which develops itself in the interstices of the fibrous mass and comprises silicon carbide and amorphous structures consisting of Si-O-C chains. The silicon carbide and the aforesaid Si-O-C chains have been generated by the process of pyrolysis on said polysiloxanes and/or said polysilsesquioxanes. The fibre-reinforced ceramic composite material has a porosity generated by pyrolisis on the polymeric binder composition of the pre-preg. The invention further relates to a component of a braking system made wholly or in part from said preform, and a method for making a preform in a fibre-reinforced ceramic composite material.