COATING FOR METAL COMPONENTS, METHOD FOR COATING A METAL COMPONENT, PISTON FOR INTERNAL COMBUSTION ENGINES AND MOTOR VEHICLE

• Main Authors: STOTHARD, Nigel, PROCOPIO, Andrea, UNGAR, Stefan
• Format: Patent
• Language: English; French; German
• Published: 17.07.2019
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMBUSTION ENGINES; CYLINDERS; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; PISTONS; SEALINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THERMAL INSULATION IN GENERAL; WEAPONS

An abrasion-resistant and friction-reduced coating for metal components is provided. The coating includes an inner layer, an intermediate layer and an outer layer. The inner layer is intended to be applied to the metal component and has at least one layer selected from: a metal layer, a metal-carbide layer, a metal-nitride layer, a metalcarbide- nitride layer and a metal-containing hydrocarbon layer. The intermediate layer includes at least one layer of amorphous carbon and the outer layer includes a W-C:H layer or a a-C:H* layer. A maximum layer thickness of the coating is at most 5 μm. The coating is suitable in particular as a piston coating for use in internal combustion engines.