Patent · US Expired

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

US5447804A · kind A · utility

19Cited by

8References

9Claims

0Family size

Assignee

Balzers Aktiengesellschaft · LI

Inventors

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

Key dates

Filing date	Jan 26, 1994
Grant date	Sep 5, 1995
Priority date	—
Expiry date	Jan 26, 2014

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 0.sub.3 mixed crystals and a chrome content higher than 5 at %. The coating is deposited at a temperature lower than 900.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.