Polycrystalline diamond compacts including a domed polycrystalline diamond table, and applications therefor

摘要

Embodiments of the invention relate to polycrystalline diamond compacts (“PDCs”) including a domed polycrystalline diamond (“PCD”) table that exhibit improved wear resistance and/or thermal stability. In an embodiment, a PDC includes a substrate having an interfacial surface, and a domed PCD table bonded to the interfacial surface of the substrate. The domed PCD table includes an exterior, convex generally cylindrical peripheral surface extending away from the interfacial surface of the substrate. The domed PCD table further includes a domed portion defining an upper, convex generally spherical surface, and an optional chamfer extending between the exterior, convex generally cylindrical peripheral surface and the upper, convex generally spherical surface.

主权项

1. A polycrystalline diamond compact, comprising:
a substrate including an interfacial surface; and a domed polycrystalline diamond table bonded to the interfacial surface of the substrate, the domed polycrystalline diamond table including:
an exterior, convex generally cylindrical peripheral surface extending away from the interfacial surface of the substrate;a domed portion defining an upper, convex generally spherical surface; anda chamfer extending between the exterior, convex generally cylindrical peripheral surface and the upper, convex generally spherical surface;wherein the domed polycrystalline diamond table exhibits a maximum thickness;wherein the upper, convex generally spherical surface exhibits a radius of curvature of about 0.400 inch to about 0.800 inch; andwherein a ratio of the radius of curvature to the maximum thickness is about 2 to about 7.