Method of making a superhard construction

摘要

A method of making a superhard construction 20 by providing; a polycrystalline superhard / PCS structure 34 comprising bonded grains of a superhard material, an aggregated mass comprising grains of the superhard material and a substrate 40. having a recess configured for accommodating the PCS structure. The PCS structure is placed into a recess 44 of the substrate with the aggregated mass of superhard grains positioned adjacent the PCS structure 34. Pressure and heat are applied to the unjoined assembly to join the aggregated mass to the PCS structure and form the superhard construction. A second PCS structure 32 can be sintered to form the superhard construction. The PCS structure may comprise polycrystalline diamond material. The substrate may contain a catalyst material for diamond.