Dry prepreg for ceramic matrix composites
Assignee3M Innovative Properties Company
InventorsDaimon K Heller, Aaron R. Beaber, Amit J. Patel, Kari A. McGee, Henrik B. Van Lengerich, James M. Reimer
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Abstract
Dry prepregs for ceramic matrix composites are described. The dry prepregs comprise a tow or fabric of ceramic fibers infiltrated with preceramic matrix comprising low levels of an aqueous solvent. The preceramic matrix contains an inorganic portion and a binder system. Binder systems comprising a binder and a plasticizer for the binder are described.
Claims16
A dry prepreg comprising a tow of ceramic fibers infiltrated with a preceramic matrix comprising 45 to 60 volume % inorganic oxide and 40 to 55 volume % of an organic binder system based on the total volume of the preceramic matrix, wherein the preceramic matrix comprises no greater than 4 weight percent of an aqueous solvent based on the total weight of the preceramic matrix;
- wherein the organic binder system comprises a polymeric binder, wherein the polymeric binder comprises polyoxazoline.
A method of making a dry prepreg comprising
- (i) infiltrating a tow of ceramic fibers with a ceramic matrix slurry comprising an inorganic oxide, an organic binder system comprising a polymeric binder, and an aqueous solvent, wherein the polymeric binder comprises polyoxazoline;
- and
- (ii) drying the slurry to form a preceramic matrix comprising 45 to 60 volume % of the inorganic oxide and 40 to 55 volume % of the organic binder system based on the total volume of the preceramic matrix, wherein the preceramic matrix comprises no greater than 4 weight percent of the aqueous solvent based on the total weight of the preceramic matrix.
Dependencies are inferred from the claim text.