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

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United States of America Patent

PATENT NO 9488276
APP PUB NO 20150292622A1
SERIAL NO

14439813

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Abstract

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The present application relates to a sliding element, in particular a piston ring, having at least one sliding surface which has a coating which has, from the inside outwards, a metal-containing bonding layer and a DLC layer, where the DLC layer is an amorphous hydrogen-free diamond-like carbon layer which has a DLC main layer which extends from the bonding layer to an adjoining DLC covering layer and has a carbon content of more than about 98.5 at %, oxygen and/or hydrogen and/or nitrogen in a proportion of in each case less than about 0.5 at % and an sp2/sp3 ratio of the carbon in the range from about 1 to about 3, and a DLC covering layer which extends from the DLC main layer to the surface of the sliding element and has a lower carbon content and/or higher oxygen content and/or higher hydrogen content compared to the main layer and also metals and/or metal oxides and an sp2/sp3 ratio of the carbon in the range from about 1 to about 3.

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Patent Owner(s)

  • FEDERAL-MOGUL BURSCHEID GMBH

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ivanov, Yuriy Burscheid, DE 5 32
Kennedy, Marcus Dusseldorf, DE 29 157
Lammers, Ralf Wermelskirchen, DE 13 121
Zinnabold, Michael Burscheid, DE 18 108

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