Patent ID: 8475918
Filing Date: 2013-07-02
Classification: B01J,B22F,B24D,C04B,C22C,C23C,Y10T

Abstract:
1. A cutting element, comprising: a substrate; and an unleached polycrystalline table attached on an end of the substrate, the polycrystalline table comprising a plurality of continuously inter-bonded grains of a superhard material and an unaltered quantity of catalyst material used to catalyze inter-bonding of the grains of the superhard material disposed in interstitial spaces between grains of the plurality of continuously inter-bonded grains of a superhard material, wherein a mean grain size of the plurality of continuously inter-bonded grains is at least substantially uniform throughout the polycrystalline table, a mean volume of the interstitial spaces between grains of the plurality of continuously inter-bonded grains is at least substantially uniform across the polycrystalline table in a direction parallel to a central axis of the polycrystalline table, and the quantity of catalyst material varies across the polycrystalline table in the direction parallel to the central axis of the polycrystalline table.