DOPED SILICON CARBIDE CERAMIC MATRIX COMPOSITE

• Main Authors: SHE, Ying, READ, Kathryn S, LAZUR, Andrew J
• Format: Patent
• Language: English; French; German
• Published: 17.07.2024
• Subjects: ARTIFICIAL STONE; 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; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF NATURAL STONE

A method for forming ceramic matrix composite (CMC) component includes forming a fiber preform (58), positioning the fiber preform (58) into a chemical vapor infiltration reaction chamber (18), and densifying the fiber preform (58). Densification includes infiltrating the fiber preform (58) with a first gas comprising precursors of silicon carbide and infiltrating the fiber preform (58) with a second gas comprising a first rare earth element, wherein the steps of infiltrating the fiber preform (58) with the first gas and infiltrating the fiber preform (58) with the second gas are conducted simultaneously to produce a first rare earth-doped silicon carbide matrix in a first region (86; 92, 96) of the component.