Process for coating diamond with refractory metal carbide and metal

摘要

The invention relates to method of depositing refractory metal carbide onto part of a surface of a body comprising diamond, the method including adhering directly onto part of the surface a refractory precursor material comprising a compound including oxygen and at least one metal selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W; the refractory precursor material being reducible in the presence of carbon on the application of heat to form at least one compound comprising metal carbide or mixed metal carbide; and reducing the refractory precursor material by the application of heat. The invention further relates to a body comprising diamond, part of the surface of the body having directly adhered thereto a metal carbide and part of the surface of the body having directly adhered thereto a metallic material and the content of diamond being greater than 80 volume percent of a volume of the body.

主权项

1. A body comprising diamond as individual grains or as a bonded mass of individual grains, wherein each of said grains comprises a micro-porous layer directly adhered to the grains where the micro-porous layer comprises a refractory precursor material comprising an oxide of at least one metal selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W;
the refractory precursor material being reducible in the presence of carbon on the application of heat to form at least one compound comprising metal carbide or mixed metal carbide; and a solvent/catalyst precursor material contained on a surface of and inside pores of the micro-porous layer, said solvent/catalyst comprising a compound including oxygen and at least one metal selected from the group consisting of Fe, Co, Ni and Mn, the solvent/catalyst material being capable of reducing in the presence of carbon on the application of heat to form a metallic material.