Bearing material of porous SIC having a trimodal pore composition

Abstract

The invention relates to bearing materials of porous SiC having a trimodal pore composition and also a process for their production. The porous bearing material of pressureless-sintered SiC having from 3 to 10% by volume of independent closed pores having a trimodal pore composition consisting of micropores (M), fiber-shaped macropores (F) and spherical macropores (S), where the amounts in the pore system F-M-S (FIG. 1) are fixed by the trapezoidal area having the corner points a=10%M-80%F-10%S b=10%M-10%F-80%S c=40%M-10%F-50%S d=40%M-50%F-10%S and the micropores have a diameter of less than or equal to 5 .mu.m and the fiber-shaped macropores have a diameter of less than or equal to 30 .mu.m and a length of less than or equal to 80 .mu.m and the spherical macropores have a diameter of less than or equal to 70 .mu.m, and have a flexural strength of at least 250 MN/m.sup.2.

Dependencies are inferred from the claim text.