Cubic boron nitride coated material and producing method of the same

Abstract

A cubic boron nitride coated material comprises a substrate, an outer layer consisting essentially of cubic boron nitride and formed on a surface of the substrate, and at least one intermediate layer interposed between the substrate and outer layer, the intermediate layer comprising at least one nitrogen-containing compound selected from the nitrides and nitroxides of Al, Ga, In and Tl and mutual solid solutions thereof. Such a coated material can be produced by a method that comprises: providing, on the surface of a substrate, at least one intermediate layer comprised of at least one nitrogen-containing compound selected from the group consisting of nitrides and nitroxides of Al, Ga, In and Tl and mutual solid solutions thereof; and causing the outer cubic boron nitride layer to undergo oriented growth on a face of the layer of the at least one nitrogen-containing compound, the face being densely packed with nitrogen atoms.

Dependencies are inferred from the claim text.