Patent ID: 8727046

Claim:
A polycrystalline diamond compact, comprising: at least one polycrystalline diamond layer, at least a portion of the at least one polycrystalline diamond layer including: a plurality of diamond grains exhibiting an average diamond grain size of 30 μm or less and defining a plurality of interstitial regions; 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 Oersteds (“Oe”) or more; and wherein the plurality of diamond grains and the metal-solvent catalyst collectively exhibit a specific magnetic saturation of about 15 Gauss·cm 3 /grams (“G·cm 3 /g”) or less; a cemented carbide substrate; and at least one transition layer disposed between and bonded to the cemented carbide substrate and the at least one polycrystalline diamond layer, the at least one transition layer exhibiting a coefficient of thermal expansion (“CTE”) that is less than a CTE of the cemented carbide substrate and greater than a CTE of the at least one polycrystalline diamond layer.