SUPERHARD CONSTRUCTIONS & METHODS OF MAKING SAME

摘要

A superhard polycrystalline construction comprises a body of polycrystalline superhard material comprising a first superhard phase having a first average grain size; and a second superhard phase having a second average grain size. The second superhard phase is located in one or more channels or apertures in the first superhard phase, the first superhard phase forming a skeleton in the body of superhard material. The second superhard phase is bonded to the first superhard phase by a non-superhard phase and the first superhard phase differs from the second superhard phase in average grain size and/or composition. There is also disclosed a method of making such a superhard polycrystalline construction.