Abstract Scope |
A novel route to fabricate SiC/C composite by utilizing preceramic polymers, stabilized polyacrylonitrile fibers, and subsequent 3D printing was introduced in this study. An allyl hydrido polycarbosilane and 1,6-hexanediol diacrylate were mixed with a photoinitiator to form a photosensitive resin. The resulting resin was loaded with distinct weight percentages of oxidized polyacrylonitrile nanofiber. After the pyrolysis, the preceramic polymer formulation converts to mainly SiC matrix while the fibers transform to reinforcing carbon fibers simultaneously within one pyrolysis cycle. The prepared precursor resin proved to have outstanding photo-curing properties and the ability to transform to the silicon carbide phase. The obtained ceramic hybrid composite was mostly dense with nearly linear shrinkage, shiny/smooth surface, and around 60% retained weight after pyrolysis. The composite appeared to have three coexisting phases including SiC, SiOC, and turbostratic carbon. The results are promising to fabricate high-temperature composites with shorter fabrication time and complex geometries. |