LOCALIZED PARTICLE ADDITIONS TO REDUCE DEFECTS IN CERAMIC MATRIX COMPOSITES CAUSED BY COMPLEX GEOMETRY PREFORMING

• Main Authors: READ, Kathryn S, LAZUR, Andrew J
• Format: Patent
• Language: English; French; German
• Published: 07.12.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE

A method of forming a ceramic matrix composite component includes forming a fiber preform (20), the fiber preform (20) including a plurality of ceramic fiber plies (22), a non-reduced fiber region having an areal weight, and a reduced fiber region characterized by a reduced areal weight less than the areal weight of the non-reduced fiber region by at least 5 percent. The method further includes selectively applying ceramic particles (30) to the reduced fiber region in such manner as to avoid applying the ceramic particles (30) to the non-reduced fiber region, and subsequently densifying the preform (20).