Patent ID: 8616306

Claim:
A polycrystalline diamond compact, comprising: a substrate; and a polycrystalline diamond table including a first polycrystalline diamond layer bonded to the substrate and at least a second polycrystalline diamond layer, at least an un-leached portion of the polycrystalline diamond table including: a plurality of diamond grains defining a plurality of interstitial regions; and a metal-solvent catalyst occupying at least a portion of the plurality of interstitial regions; wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oe or more and a specific magnetic saturation of about 15 GÂ·cm 3 /g or less; and wherein at least one of the second polycrystalline diamond layer exhibits a second average diamond grain size that is less than a first average diamond grain size of the first polycrystalline diamond layer or the first polycrystalline diamond layer includes a tungsten-containing material therein.