Patent · US Active

Sliding element, in particular a piston ring, having a coating

US9103442B2 · kind B2 · utility

1Cited by

11References

20Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

Marcus Kennedy · Düsseldorf, DE
Michael Zinnabold · Burscheid, DE

Key dates

Filing date	Nov 24, 2011
Grant date	Aug 11, 2015
Priority date	—
Expiry date	Apr 11, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/30
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a sliding element, such as a piston ring, comprising a coating on at least one surface comprising, form inside to outside, a bonding layer, a metal DLC layer preferably containing tungsten, and a metal-free DLC layer doped with nitrogen at least in some regions, wherein said sliding element is characterized in that the nitrogen content in the metal-free DLC layer is graduated.

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