METHOD FOR ELECTROPHORETICALLY COATING A CERAMIC MATRIX COMPOSITE PART WITH AN ENVIRONMENTAL BARRIER

• Main Authors: PIN, Lisa, ARNAL, Simon, PRIOUX, Manon, ANSART, Florence, DULUARD, Sandrine
• Format: Patent
• Language: English; French; German
• Published: 02.10.2024
• Subjects: APPARATUS THEREFOR; ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; 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; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ENGINE PLANTS IN GENERAL; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; LIME, MAGNESIA; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; REFRACTORIES; SLAG; STEAM ENGINES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF NATURAL STONE; WEAPONS

The invention relates to a method for producing an environmental barrier coating (12) electrophoretically on a ceramic matrix composite part (10), the method comprising the following steps: - E10: electrophoretic application to the surface (S) of the part (10) of a liquid suspension of a composition comprising at least one rare earth silicate powder and conductive fillers; - E20: drying of the suspension applied; and - E30: sintering heat treatment of the rare earth silicate powder, characterized in that use is made, as conductive fillers, of at least one nitrate selected from the group consisting of aluminium, yttrium and ytterbium nitrates in an amount of between 0.2 and 1 millimole per litre of liquid suspension.