Patent · US Active

Mechanical part coated with a layer of amorphous carbon for sliding in relation to a less hard component

US10344242B2 · kind B2 · utility

0Cited by

0References

15Claims

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Assignee

H.E.F. · FR

Inventor

Christophe Heau · Orange, FR

Key dates

Filing date	Jul 7, 2014
Grant date	Jul 9, 2019
Priority date	—
Expiry date	Mar 15, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C16/26
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A mechanical part provided with an amorphous carbon coating (with at least 70 wt. % of carbon not including hydrogen) and used to cooperate slidingly with an antagonistic part having a surface hardness which is a maximum of two thirds of that of the coating. The mechanical part is such that the coating has a roughness Ra which, measured by profilometry, is equal to a maximum of 0.050 microns and, measured by atomic force microscopy, a micro-roughness which is equal to a minimum of 0.004 microns and a maximum of 0.009 microns. This minimizes the wear of the less hard antagonistic part and that of the coating.

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