POLYCRYSTALLINE SUPERABRASIVE COMPOSITE TOOLS AND METHODS OF FORMING THE SAME

摘要

A polycrystalline superabrasive composite tool can be produced using high pressure high temperature processes allowing for increased thermal resistance, wear resistance and toughness of abrasive tools, and additionally allowing for increased effective thickness of abrasive tools A compact (10) can include a support substrate (16) and a superabrasive polycrystalline layer (20) having a diffusion bpdge (12) embedded therein that includes a carbide former A working layer (22) can be attached adjacent to the superabrasive polycrystalline layer (20) and opposite the support substrate (16) to form a drill bit sandwich segment The diffusion bridge matrix allows for a new welding phase at each interface between the superabrasive polycrystalline layer (20) and support substrate (16) and between the polycrystalline layer (20) and the metal working layer (22), thus eliminating delamination failure at the interfaces The polycrystalline superabrasive composite tools can be incorporated for use in machining, drilling, grinding, cutting, polishing, etc