REVETEMENT LUBRIFIANT COMPRENANT DU GRAPHENE BICOUCHE OU DU NITRURE DE BORE UTILE POUR DES APPLICATIONS TRIBOLOGIQUES

• Main Authors: LAURENT, CHRISTOPHE, SOBRINO, JEAN-MICHEL, CARDEY, PIERRE-FRANCOIS, WEIBEL, ALICIA, GARCIA, JULIEN, ANSART, FLORENCE, TURQ, VIVIANE, MARSAL, ALEXIS, HENTOUR, KARIM
• Format: Patent
• Language: French
• Published: 30.06.2023
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS THEREOF; CONCRETE; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; INORGANIC CHEMISTRY; LIME, MAGNESIA; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; NON-METALLIC ELEMENTS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; REFRACTORIES; SLAG; SPRAYING OR ATOMISING IN GENERAL; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; TREATMENT OF NATURAL STONE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

La présente invention a trait à un revêtement composite comprenant une matrice solide de type céramique obtenue via un procédé sol/gel, dans laquelle est incluse une charge lubrifiante sous forme de particules lamellaires cristallines comprenant un empilement de 2 à 5 feuillets de carbone ou de nitrure de bore hexagonal. Le revêtement de l'invention est utile pour améliorer le comportement tribologique de substrats tels que des substrats métalliques vis-à-vis de substrats de toutes natures (métallique, polymère, céramique). La présente invention a également trait au procédé de fabrication des substrats revêtus correspondants, mais également au sol chargé précurseur dudit revêtement et à son procédé de préparation. The invention relates to a composite coating comprising a solid matrix of the ceramic type produced via a sol/gel method, in which a lubricating filler is included in the form of crystalline lamellar particles comprising a stack of 2 to 5 carbon sheets. The coating of the invention can be used to improve the tribological behaviour of substrates such as metal substrates in relation to all types of substrates (metal, polymer, ceramic). The invention also relates to a method for producing corresponding coated substrates, to the charged sol which is a precursor of said coating, and to the production method thereof.