Fabrication of dense SiSiC ceramics by a hybrid additive manufacturing process

In this work, we report the fabrication of Silicon infiltrated Carbide (SiSiC) components by a hybrid additive manufacturing process. Selective laser sintering polyamide powders was used to 3D print polymeric preform with controlled relative density, which allows geometrically complex parts small features. Preceramic polymer infiltration silicon carbide precursor followed pyrolysis (PIP) convert into an amorphous SiC ceramic, and five PIP cycles were performed increase density part. The final densification achieved via liquid (LSI) at 1500°C, obtaining SiSiC ceramic component without change size shape distortion. crystallization previously generated phase, associated volume change, allowed fully infiltrate part leading almost dense material consisting ?-SiC Si in fraction 45% 55% respectively. advantage approach is possibility ceramics directly from preceramic precursor, need adding powder infiltrating solution. This can be seen as alternative AM Binder jetting direct ink writing for production templates further processed infiltration.