Patent ID: 8308830
Filing Date: 2012-11-13
Classification: C09K,Y10T

Abstract:
1. A coated boron or nitrogen containing superhard abrasive material selected from cBN, boron suboxide and boron carbide comprising: a cBN, boron suboxide or boron carbide superhard abrasive material substrate; a primary layer of a carbide/nitride/boride forming metal that is substantially in the form of a carbide, nitride or boride; a secondary layer of a high melting point metal selected from W, Mo, Cr, Ni, Ta, Au, Pt, Pd and alloys thereof; and an overcoat of Ag, Ni, Cu, Au, Pd, Pt, Rh, Os, Ir, Re, combinations and alloys thereof, the metal of the secondary layer being different to the metal of the overcoat.