Method for producing a sliding surface
AssigneeSchaeffler Technologies AG & Co. KG
InventorsOliver Witter, Klaus Feldner, Stefan Dupke, Holger Pätzold, Frank Schlerege, Serge Kursawe
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Abstract
A method for producing a reduced friction sliding surface on a machine element includes applying a coating comprising amorphous carbon to a surface of the machine element and locally heating the coating with a laser. The coating is heated to a temperature below an evaporation temperature of the coating to achieve a local volumetric increase in the coating and a local increase in a layer thickness of the coating. A surface structure of the coating includes a multiplicity of elevations resulting from a local phase transformation of the coating from amorphous carbon into graphite due to the locally heating.
Claims8
A machine element, comprising:
- a sliding surface configured for sliding contact with at least one further machine element, the sliding surface comprising a coating including amorphous carbon and a surface structure on the coating comprising an array of elevations,
- wherein the array of elevations is formed via a laser which locally heats the coating so as to induce a local phase transformation of the amorphous carbon into graphite.
Dependencies are inferred from the claim text.