Coated hard tool having multi-layer coating

Details Coated hard tool having multi-layer coating Coated hard tool having multi-layer coating

1998-06-09

2000-06-20

Turner, A. A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428212, 428336, 428469, 428472, 428697, 428698, 428699, 428701, 428702, 51307, 51309, B32B 900, B32B 702

Patent

active

060775963

ABSTRACT:
In a coated hard tool, a hard coating is formed on a hard base material, wherein the coating includes ten or more sublayers of types A and B stacked alternately. In the sublayer of type A, a plurality of secondary sublayers of different types each having a thickness of 1 to 50 nm are stacked periodically and repeatedly, while the sublayer of type B is formed of a single layer. The sublayers each have a thickness of 100 to 1000 nm. Each sublayer contains at least one compound selected from a nitride, a carbide, a nitrided carbide and an oxide containing at least one element selected from elements of periodic group 4A, elements of periodic group 5A, Al and B.

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patent: 4835062 (1989-05-01), Holleck
patent: 4895770 (1990-01-01), Schintlmeister et al.
patent: 5503912 (1996-04-01), Setoyama et al.
patent: 5783295 (1998-07-01), Barnett et al.

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