POLYCRYSTALLINE DIAMOND COMPACT INCLUDING A SUBSTRATE HAVING A RAISED INTERFACIAL SURFACE BONDED TO A POLYCRYSTALLINE DIAMOND TABLE, AND APPLICATIONS THEREFOR

摘要

In various embodiments, a polycrystalline diamond compact (“PDC”) comprises a substrate including an interfacial surface having a raised region. In an embodiment, a PDC comprises a substrate including an interfacial surface having a generally cylindrical raised region and a peripheral region extending about the generally cylindrical raised region. The generally cylindrical raised region extends to a height above the peripheral region of about 450 μm or less. The PDC includes a PCD table bonded to the interfacial surface of the substrate. The PCD table includes an upper surface and at least one peripheral surface, and includes a plurality of bonded diamond grains defining interstitial regions. At least a portion of the interstitial regions includes a metallic constituent therein.

主权项

1. A polycrystalline diamond compact, comprising:
a substrate including an interfacial surface having a raised region and a peripheral region extending about the raised region, the raised region having an upper surface at a height above the peripheral region, the first height being about 450 μm or less; and a polycrystalline diamond table bonded to the interfacial surface of the substrate and integrally formed with the substrate, the polycrystalline diamond table including an upper surface and at least one peripheral surface, the polycrystalline diamond table including a plurality of bonded diamond grains defining a plurality of interstitial regions, the polycrystalline diamond table including:
an unleached first region adjacent to the substrate in which at least a portion of the plurality of interstitial regions of the first region includes a metallic constituent disposed therein; anda leached region from which the metallic constituent is depleted, the leached region extending inwardly from the upper surface, at least a portion of the leached region as measured from the upper surface of the polycrystalline diamond table extending past the upper surface of the raised region.