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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Correlation Between Rheology, Print Quality, and Porosity in Robocasted Silicon Nitride Ceramics
Author(s) Christian Isaac Mendez Moreno, Carmen Rocha, Nicholas Ku, Abigail Ortega, Francisco Medina
On-Site Speaker (Planned) Christian Isaac Mendez Moreno
Abstract Scope This study investigates the development of silicon nitride (Si₃N₄) ceramic slurries for robocasting through the evaluation of various binders, dispersants, and balancing agents. Multiple slurry formulations were prepared using different additive concentrations to determine their influence on rheological behavior, printability, and final part quality. Rheological testing was conducted to evaluate viscosity and flow characteristics required for successful extrusion during the robocasting process. The optimized formulations were subsequently printed into test geometries and analyzed for density and porosity after processing. Results demonstrated that additive selection and concentration significantly affected slurry stability, extrusion consistency, and structural integrity of the printed components. Porosity measurements ranged from approximately 20% to 10%, indicating notable improvements in densification and print quality among the optimized formulations. The findings highlight the importance of slurry formulation design in achieving enhanced rheological performance and improved physical properties for silicon nitride ceramic components fabricated through material extrusion techniques
Proceedings Inclusion? Undecided

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