Polycrystalline diamond compact including a polycrystalline diamond table fabricated with one or more sp²-carbon-containing additives to enhance cutting lip formation, and related methods and applications

摘要

In an embodiment, a polycrystalline diamond compact (“PDC”) includes a substrate and a polycrystalline diamond (“PCD”) table bonded to the substrate. The PCD table includes a first PCD region having bonded-together diamond grains, with the first PCD region exhibiting a first thermal stability and a first diamond density. The PCD table further includes an intermediate second PCD region bonded to the substrate and disposed between the first PCD region and the substrate. The intermediate second PCD region includes bonded-together diamond grains. The intermediate second PCD region exhibits a second thermal stability that is less than that of the first thermal stability of the first PCD region and a second diamond density less than that of the first diamond density of the first PCD region.