Part coated with a carbon-based layer
AssigneeHydromecanique Et Frottement
InventorsMarie-Alix LEROY, Michaël OUGIER
Life of this patent
Estimating the term…
Abstract
The invention relates to a metal part comprising a metallic substrate (S) having an outer surface coated with a layer of carbon-based material (M). According to the invention, the layer of carbon-based material:—is of “DLC” amorphous carbon type, from the a-C family; • comprises less than 3 at % of oxygen within the layer of carbon-based material; • does not contain hydrogen, nitrogen, or doping elements.
Claims20
A metal part comprising a metallic substrate (S), having an outer surface coated with a carbon-based material (M) outer layer, wherein the carbon-based material layer:
- is of “DLC” amorphous carbon type, from the a-C family;
- comprises at most 3 at % of oxygen within the carbon-based material layer;
- and
- does not contain hydrogen, nitrogen, or doping elements.
A method for depositing, with ion assistance, a carbon-based material (M) outer layer on a metallic substrate (S), the deposition being done according to one of the techniques from among:
- magnetron sputtering, continuously or pulsed,
- high power impulse magnetron sputtering (HiPIMS),
- unbalanced configuration magnetron sputtering, and optionally in a closed field,
- radiofrequency sputtering (RF sputtering),
- or any combination which can be done from these techniques;
- said method comprising performing the deposition with an ion assistance, a level of which has been adjusted, such that the carbon-based material (M) layer contains, at most, 3 at % of oxygen within the carbon-based material (M) layer.
Dependencies are inferred from the claim text.