Complex geometry macroporous SiC ceramics obtained by 3D-printing, polymer impregnation and pyrolysis (PIP) and chemical vapor deposition (CVD)

We present here an original route for the manufacturing of SiC ceramics based on 3D printing, polymer impregnation and pyrolysis chemical vapor deposition (CVD). The green porous elastomer structures were first prepared by fused modeling (FDM) 3D-printing with a composite polyvinyl alcohol/elastomer wire soaking in water, then impregnated allylhydridopolycarbosilane preceramic polymer. After crosslinking pyrolysis, polymer-derived reinforced CVD using CH3SiCl3/H2 as precursor. multiscale structure specimens was examined X-ray tomography scanning electron microscopy analyses. Their oxidation resistance also studied. pure dense CVD-SiC coating considerably improves resistance.