Patent · US Active

Bodies coated with a hard material and method for the production thereof

US8257841B2 · kind B2 · utility

7Cited by

5References

10Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Ingolf Endler · Coswig, DE
Mandy Hoehn · Dresden, DE

Key dates

Filing date	Oct 10, 2008
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Sep 7, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C28/048
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to bodies coated with a hard material, comprising a multi-layer coating system containing at least one Ti1-xAlxN hard material coating and to a multi-stage CVD method for producing the bodies. The aim of the invention is to achieve excellent adhesion of the Ti1-xAlxN hard material coating in bodies coated with a hard material comprising a multi-layer coating system containing at least one Ti1-xAlxN hard material coating and a high degree of wear resistance. According to the invention, the bodies coated with a hard material comprising a multi-layer coating system containing at least one Ti1-xAlxN hard material coating are characterized by the following features: the coating system consists of a) a bonding coating applied to the body, consisting of TiN, Ti(C,N) or TiC; b) a phase gradient coating that is applied to the bonding coating; and c) the single or multi-phase Ti1-xAlxN hard material coating or coatings applied to the phase gradient coating. The phase gradient coating consists of a TiN/h-AlN phase mixture on the side facing the bonding coating and has an increasing phase fraction of fcc-TiAIN with an increasing coating thickness, (the fraction being >50%…

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.