Polycrystalline diamond compact including pre-sintered polycrystalline diamond table having a thermally-stable region and applications therefor

摘要

In an embodiment, a polycrystalline diamond compact (“PDC”) comprises a substrate and a pre-sintered polycrystalline diamond (“PCD”) table including a plurality of bonded diamond grains defining a plurality of interstitial regions, an upper surface, and a back surface that is bonded to the substrate. The pre-sintered PCD table includes a first thermally-stable region extending inwardly from the upper surface, and a second region located between the first thermally-stable region and the substrate. The second region exhibits a thermal stability that is less than that of the first thermally-stable region, and includes at least one interstitial constituent disposed interstitially between the bonded diamond grains thereof. The at least one interstitial constituent may include at least one silicon-containing phase.

主权项

1. A polycrystalline diamond compact, comprising:
a substrate; and a preformed polycrystalline diamond table including a plurality of bonded diamond grains defining a plurality of interstitial regions and exhibiting diamond-to-diamond bonding therebetween, an upper surface, and a back surface that is bonded to the substrate, the preformed polycrystalline diamond table including:
a first thermally-stable region extending inwardly from the upper surface, the first thermally-stable region including at least one replacement material disposed interstitially between the bonded diamond grains thereof; anda second region located between the first thermally-stable region and the substrate, the second region exhibiting a thermal stability that is less than that of the first thermally-stable region, the second region including at least one interstitial constituent disposed interstitially between the bonded diamond grains thereof, the at least one interstitial constituent being different than that of the at least one replacement material of the first thermally-stable region, the at least one interstitial constituent including at least one Group IV element-containing phase.