Apparatus and methods for processing ceramic fiber
The present application provides methods and apparatus for processing ceramic fibers for the manufacture of ceramic matrix composites (CMCs). One method may include providing at least one frame including a planar array of unidirectional ceramic fibers extending across a void thereof. The method may further include depositing a coating on the ceramic fibers of the at least one frame via a chemical vapor deposition (CVD) process. The method may also include impregnating the coated ceramic fibers with a slurry including a ceramic matrix precursor composition to form at least one CMC prepreg, such as a prepreg tape. The ceramic fibers may be substantially SiC fibers, for example.
1. A method of processing ceramic fiber for the manufacture of a ceramic matrix composite (CMC) article, comprising:
providing at least one frame including a planar array of unidirectional ceramic fibers extending across a void thereof;
depositing a coating on the ceramic fibers of the least one frame via a chemical vapor deposition (CVD) process; and
impregnating the coated ceramic fibers of the at least one frame with a slurry including a ceramic matrix precursor composition to form at least one CMC prepreg, wherein impregnating the coated ceramic fibers includes removing the coated ceramic fibers from at least a portion of the at least one frame and impregnating the removed coated ceramic fibers with the slurry.
2. The method of claim 1 , wherein impregnating the coated ceramic fibers of the at least one frame includes coupling a base plate to the at least one frame extending at least partially within the void thereof such that the coated ceramic fibers and the ceramic matrix precursor composition form at least one CMC prepreg tape.
3. The method of claim 1 , wherein the CVD process includes positioning the at least one frame within a CVD reactor, and wherein the CVD process is a batch CVD process.
4. The method of claim 1 , wherein providing the at least one frame includes coupling the ceramic fibers to at least one frame.
5. The method of claim 1 , wherein at least one of the ceramic fibers comprises a ceramic fiber tow.
6. The method of claim 1 , wherein at least one of the ceramic fibers comprises a non-bundled ceramic filament.
7. The method of claim 1 , wherein the ceramic fibers include at least one continuous ceramic fiber that extends across the void a plurality of times.
8. The method of claim 1 , wherein the ceramic fibers include at least one discrete ceramic fiber that extends once across the void.
9. The method of claim 1 , wherein the ceramic fibers are substantially SiC.
10. The method of claim 1 , wherein the coating comprises at least one layer including boron nitride, silicon-doped boron nitride, carbon, silicon carbide or silicon nitride.