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METHOD TO PROCESS A CERAMIC MATRIX COMPOSITE (CMC) WITH A PROTECTIVE CERAMIC COATING
A method of producing a ceramic matrix composite including a protective ceramic coating thereon comprises applying a surface slurry onto an outer surface of an impregnated fiber preform. The surface slurry includes particulate ceramic solids dispersed in a flowable preceramic polymer comprising silicon, and the impregnated fiber preform comprises a framework of ceramic fibers loaded with particulate matter. The flowable preceramic polymer is cured, thereby forming on the outer surface a composite layer comprising a cured preceramic polymer with the particulate ceramic solids dispersed therein. The cured preceramic polymer is then pyrolyzed to form a porous ceramic layer comprising silicon carbide, and the impregnated fiber preform and the porous ceramic layer are infiltrated with a molten material comprising silicon. After infiltration, the molten material is cooled to form a ceramic matrix composite body with a protective ceramic coating thereon.
METHOD TO PROCESS A CERAMIC MATRIX COMPOSITE (CMC) WITH A PROTECTIVE CERAMIC COATING
A method of producing a ceramic matrix composite including a protective ceramic coating thereon comprises applying a surface slurry onto an outer surface of an impregnated fiber preform. The surface slurry includes particulate ceramic solids dispersed in a flowable preceramic polymer comprising silicon, and the impregnated fiber preform comprises a framework of ceramic fibers loaded with particulate matter. The flowable preceramic polymer is cured, thereby forming on the outer surface a composite layer comprising a cured preceramic polymer with the particulate ceramic solids dispersed therein. The cured preceramic polymer is then pyrolyzed to form a porous ceramic layer comprising silicon carbide, and the impregnated fiber preform and the porous ceramic layer are infiltrated with a molten material comprising silicon. After infiltration, the molten material is cooled to form a ceramic matrix composite body with a protective ceramic coating thereon.
METHOD TO PROCESS A CERAMIC MATRIX COMPOSITE (CMC) WITH A PROTECTIVE CERAMIC COATING
VERFAHREN ZUR VERARBEITUNG EINES KERAMIKMATRIXVERBUNDWERKSTOFFS (CMC) MIT EINER KERAMISCHEN SCHUTZSCHICHT
PROCÉDÉ POUR TRAITER UN COMPOSITE À MATRICE CÉRAMIQUE (CMC) AVEC UN REVÊTEMENT DE PROTECTION EN CÉRAMIQUE
SHIM SUNGBO (author)
2020-11-25
Patent
Electronic Resource
English
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