Diamond-coated body including interface layer interposed between substrate and diamond coating, and method of manufacturing the same
AssigneeOsg Corporation
InventorsHao Liu, Yoshihiko Murakami, Hiroyuki Hanyu
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Abstract
A diamond-coated body including: a substrate formed of a cemented carbide; a diamond coating; and an interface layer interposed between the substrate and the diamond coating, wherein the interface layer consists of a solid solution including an aluminum nitride and a metal which belongs to one of groups IVa, Va and VIa of the periodic table. The interface layer is preferably provided by one of TiAlN, CrAlN and VAlN. The substrate is preferably formed of a super-fine particle cemented carbide.
Claims13
A diamond-coated body comprising:
- a substrate formed of a cemented carbide;
- a diamond coating;
- and
- an interface layer interposed between said substrate and said diamond coating,
- wherein said interface layer consists of a solid solution including an aluminum nitride and a metal which belongs to one of groups IVa, Va and VIa of the periodic table.
A method of manufacturing a diamond-coated body comprising (a) a substrate formed of a cemented carbide, (b) a diamond coating, and (c) an interface layer interposed between said substrate and said diamond coating, said method comprising:
- a surface roughening step of roughening a surface of said substrate such that the roughened surface has pits and projections formed therein;
- an interface-layer forming step of forming said interface layer of one of TiAlN, CrAlN and VAlN in accordance with a physical vapor deposition method, such that said interface layer is held in contact with said roughened surface of said substrate having said pits and projections;
- and
- a diamond-coating forming step of forming said diamond coating in accordance with a chemical vapor deposition method, such that said diamond coating is held in contact with an outer surface of said interface layer.
Dependencies are inferred from the claim text.