Patent ID: 9403260
Filing Date: 2016-08-02
CPC Classification: B01J,B22F,B24D,B32B,C04B,C22C,E21B

Claim Text:
1. A method of fabricating a polycrystalline diamond compact, comprising: providing a polycrystalline diamond compact (“PDC”) formed in a first high-pressure, high-temperature (“HPHT”) process, wherein the PDC includes: positioning a sink material adjacent to the upper surface of the polycrystalline diamond table; and subjecting the PDC and the sink material to a second HPHT process to drive at least a portion of a metal-solvent catalyst out of the polycrystalline diamond table and form a modified region exhibiting porosity, wherein at least one HPHT condition of the second HPHT process is different than that used in the first HPHT process.