Patent ID: 8772190
Filing Date: 2014-07-08
Classification: C04B,F16C,Y10S

Abstract:
1. A bearing comprising: a rolling element sintered by an electric pulse assisted consolidation (SPS) process, said rolling element comprising silicon nitride, sialon or mixtures thereof and up to 10 weight % of rare earth oxides, aluminium nitride, aluminium oxide and/or oxynitrides of silicon and aluminium as additives, characterized by that the rolling element has a homogeneous microstructure and a density that is at least 99% of the theoretical density, a maximum pore volume of 1 volume %, and a secondary ceramic phase fraction volume not exceeding 0.2 volume %, wherein the secondary ceramic phase comprises unreacted powder or side products formed by sintering the rolling element; wherein said rolling element has a diameter of at least 30 millimeters.