POLYCRYSTALLINE DIAMOND CUTTING ELEMENTS HAVING NON-CATALYST MATERIAL ADDITIONS

摘要

Polycrystalline diamond cutting elements having enhanced thermal stability, drill bits incorporating the same, and methods of making the same are disclosed herein. In one embodiment, a cutting element includes a substrate having a metal carbide and a polycrystalline diamond body bonded to the substrate. The polycrystalline diamond body includes a plurality of diamond grains bonded to adjacent diamond grains by diamond-to-diamond bonds and a plurality of interstitial regions positioned between adjacent diamond grains. At least a portion of the plurality of interstitial regions comprise a non-catalyst material, a catalyst material, metal carbide, or combinations thereof. At least a portion of the plurality of interstitial regions comprise non-catalyst material that coats portions of the adjacent diamond grains such that the non-catalyst material reduces contact between the diamond and the catalyst.