Patent · US Active

Sliding element, in particular piston ring, and combination of a sliding element with a mating running element

US10131988B2 · kind B2 · utility

1Cited by

2References

19Claims

0Family size

Assignee

Federal-Mogul Burscheid GmbH · DE

Inventors

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

Key dates

Filing date	Aug 19, 2010
Grant date	Nov 20, 2018
Priority date	—
Expiry date	Sep 26, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C28/046
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A sliding element, such as a piston ring, for use in diesel or highly supercharged spark-ignition engines with iron-based mating running elements is provided. The sliding element includes a base material made of cast iron or steel and a coating. The coating includes a CrN layer, an Me(CxNy) layer, and a DLC layer extending from the inside to the outer side respectively. The DLC layer consists of a metal-containing substructure layer and a metal-free DLC top layer. The Me(CxNy) layer is crystalline and Me is tungsten (W), chromium (Cr), or Silicon (Si). The hardness of the metal-free DLC top layer is harder than the metal-containing substructure layer.

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