Patent ID: 8206474
Filing Date: 2012-06-26
Classification: B24D

Abstract:
1. An abrasive compact comprising an ultrahard polycrystalline composite material, the ultrahard polycrystalline composite material comprising at least three different particle size fractions of ultrahard abrasive particles: a major fraction comprising from 65% to 75% by mass of the polycrystalline composite material, at least one finer fraction having an average particle size of less than half that of the average particle size of the major fraction, wherein the finer particle size fraction comprising from about 15% to 20% by mass of the polycrystalline composite material, and at least one coarser fraction having an average particle size no more than twice that of the major fraction, wherein the coarser particle size fraction comprises from 10% to 15% by mass of the polycrystalline composite material.