Fused deposition of ceramics (FDC) for structural silicon nitride components

Fused Deposition of Ceramics is an SFF technique based on commercial FDM(TM) technology, for fabrication of structural and functional ceramic components. This study describes, in derail, process improvements made in pre-FDC, FDC, and post-FDC fabrication steps to achieve functional properties in commercial GS-44 silicon nitride components. Microstructural characterization of sintered FDC parts reveals microstructures similar to conventionally processed silicon nitride material. Mechanical properties of FDC processed silicon nitride bend bars and roughness samples were evaluated. These property evaluation studies demonstrate that mechanical properties similar to commercial GS-43 silicon nitride materials can be achieved using FDC. The study also describes results achieved on fabrication of complex components from silicon nitride using FDC.