Alumina coated tool and production method thereof

Details Alumina coated tool and production method thereof Alumina coated tool and production method thereof

1997-07-02

1999-10-26

Turner, Archene

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428323, 428336, 428698, 428701, 428702, 51307, 51309, B23B 2714

Patent

active

059724951

ABSTRACT:
An alumina coated tool comprising a plurality of refractory layers and a substrate body. The refractory layers comprise a non-oxide layer on the surface of the substrate body, a bonding layer having a face-centered-cubic structure on the non-oxide layer, and an oxide layer on the bonding layer. The non-oxide layer is at least one of carbide, nitride and carbonitride of a metal selected from the group consisting of the Groups IVa, Va and VIa of the Periodic Table. The bonding layer is a single- or multi-coating of oxide, oxycarbide, oxynitride, oxycarbonitride of a metal selected from the group consisting of the Groups IVa, Va and VIa of the Periodic Table. The oxide layer is substantially .alpha.-Al.sub.2 O.sub.3. The epitaxial relationship between the non-oxide layer and the bonding layer enhances the bonding strength of the oxide layer to provide an alumina coated tool resistant to flaking of the oxide layer.

REFERENCES:
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patent: 5635247 (1997-06-01), Ruppi
patent: 5652045 (1997-07-01), Nakamura et al.
patent: 5705263 (1998-01-01), Lenander et al.

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