Patent ID: 8236074

Claim:
A superabrasive compact, comprising: a substrate; a preformed polycrystalline diamond table; and a braze material bonding the substrate to the preformed polycrystalline diamond table, wherein at least a majority of the braze material comprises an iron-nickel-based alloy, wherein the braze material is depleted from a selected region of the preformed polycrystalline diamond table; wherein the preformed polycrystalline diamond table is brazed to the substrate with the braze material according to a process comprising: disposing the braze material between the substrate and the preformed polycrystalline diamond table; and subjecting the braze material, the substrate, and the preformed polycrystalline diamond table to a high-pressure/high-temperature brazing process having a pressure of at least about 20 kilobar and a temperature of at least about 800° Celsius; wherein the preformed polycrystalline diamond table exhibits a compressive residual stress field characteristic of the preformed polycrystalline diamond table being brazed to the substrate with the braze material in the high-pressure/high-temperature brazing process.