Method for fabrication of a ceramic matrix composite sandwich structure
AssigneeHRL Laboratories, LLC
InventorsChristine M. Lihn, Jacob M. Hundley, Tobias A. Schaedler, Eric C. Clough, Kenneth Cante
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Abstract
A method for fabricating a ceramic matrix composite structure. A core having an ordered structure is fabricated of a preceramic polymer and pyrolyzed. Facesheets, either uncured or cured, are placed on the core (with a bonding layer of preceramic polymer resin if the facesheets are cured) and the assembly is cured and pyrolyzed. The pyrolyzed assembly is re-infiltrated with preceramic polymer resin and re-pyrolyzed. The cycle of re-infiltration and re-pyrolyzation is repeated until the mass gain per cycle stabilizes.
Claims20
A method for fabricating a composite structure, the method comprising:
- forming a core, the core comprising ceramics as a major component;
- forming a first facesheet, the first facesheet comprising a composite, the composite comprising ceramic fibers and a matrix, the matrix being a material selected from the group consisting of preceramic polymer resins, preceramic polymers, and combinations thereof;
- placing the first facesheet on a first surface of the core to form a preceramic assembly, the core interpenetrating into the first facesheet;
- and
- concurrently subjecting the first facesheet and the core of the preceramic assembly to a first pyrolyzing process.
Dependencies are inferred from the claim text.