Carbon-ceramic brake disc

1 . A carbon-ceramic brake disc ( 1 ) which can be secured directly to the wheel axle without a metal hub plate, the brake disc being made from ceramic reinforced with carbon fibres and having the shape of a hub plate in the vicinity of the axis of rotation ( 6 ) and the shape of an annular disc in the vicinity of the outer periphery.

2 . The carbon-ceramic brake disc ( 1 ) according to claim 1 , characterised in that at least three bores or recesses are arranged around the inner periphery ( 2 ), corresponding to similar bores or recesses or mounted pins on the wheel axle.

3 . The carbon-ceramic brake disc ( 1 ) according to claim 1 , characterised in that the internal diameter is 40 mm to 100 mm, and in that the disc body is divided up so that the inner flat disc part ( 3 ) close to the axis of rotation extends perpendicular to the axis of rotation ( 6 ) in the radial direction starting at 10% to 25% and ending at 20% to 45%; then there follows a cranked part ( 4 ) starting at 20% to 35% and ending at 25% to 70% of the way along the radius, and thereafter the friction ring part ( 5 ) extends, adjoining the latter, from 25% to 70% of the way along the radius to 100% of the way along the radius.

4 . The carbon-ceramic brake disc ( 1 ) according to claim 1 , characterised in that its material is a ceramic reinforced with carbon fibres where of the matrix substantially comprises silicon carbide, silicon and carbon.

5 . The carbon-ceramic brake disc ( 1 ) according to claim 1 , characterised in that carbon fibres having an average length of more than 30 mm are used in the zone having the shape of a hub plate, comprising the regions of the face ( 3 ) and the cranked part ( 4 ).