Patent · US Expired

Hard coating; a workpiece coated by such hard coating and a method of coating such workpiece by such hard coating

US5310607A · kind A · utility

38Cited by

11References

8Claims

0Family size

Assignee

Balzers Aktiengesellschaft · LI

Inventors

Hans Schulz · Pfullingen, DE
Erich Bergmann · Mels, CH

Key dates

Filing date	Aug 13, 1991
Grant date	May 10, 1994
Priority date	—
Expiry date	Aug 13, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C30/005
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The hard coating includes mainly (Al,Cr).sub.2 O.sub.3 crystals and a chrome content higher than 5 at % wherein the (Al, Cr).sub.2 O.sub.3 is a single crystal. The coating is deposited at a temperature lower than 90.degree. C., preferably lower than 500.degree. C. The hard coating is deposited by a CVD or PVD process.

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