Friction disc, process for the production thereof and vehicle brake

A vehicle brake, comprising a friction disc including:

• a periphery and a center;
• a cylindrical zone A to be force-lockingly connected to a shaft, said cylindrical zone A formed as a supporting disc having a top surface;
• at least one cylindrical annular zone B formed as a friction layer and connected with said top surface of said supporting disc;
• said annular zone B having a side remote from said supporting disc with recesses formed therein, said recesses having at least one shape selected from the group consisting of radially trapezoidal, involutely curved, elliptical, circular and polygonal, said recesses being at least one of open and closed towards at least one of said periphery and said center;
• said supporting disc A formed of a fiber-reinforced ceramic material having a matrix material and said supporting disc A being shaped from a single piece in a green state prior to ceramization;
• said annular zone B formed of a ceramic material;
• and
• said ceramic material of said annular zone B and said matrix material of said fiber-reinforced ceramic of said supporting disc A being selected independently of one another from the group consisting of silicon, silicon carbide, silicon nitride, carbon, boron nitride, boron carbide, Si/B/N/C and mixtures thereof.