Patent ID: 7585342

Claim:
A polycrystalline superabrasive composite tool, comprising: (a) a support substrate; (b) a superabrasive polycrystalline layer having a diffusion bridge matrix embedded therein, said diffusion bridge matrix including a carbide former; (c) a metal working layer adjacent to the superabrasive polycrystalline layer and opposite the support substrate, wherein the diffusion bridge matrix forms a metallic phase at each of an interface between the support substrate and the superabrasive polycrystalline layer, and an interface between the superabrasive polycrystalline layer and the metal working layer, the support substrate, the superabrasive polycrystalline layer and the metal working layer forming a drill bit sandwich segment; and (d) a drill bit having the drill bit sandwich segment attached to a drill tip of the drill bit such that portions of the diffusion bridge matrix are exposed along contact working surfaces and oriented substantially normal to each of the support substrate and the metal working layer.