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Meeting MS&T25: Materials Science & Technology
Symposium Additive Manufacturing of Ceramic-Based Materials: Process Development, Materials, Process Optimization and Applications
Presentation Title Viscosity Adjustment Without Binder
Author(s) Jacob Paul Feldbauer
On-Site Speaker (Planned) Jacob Paul Feldbauer
Abstract Scope In direct ink writing (DIW) of silicon carbide (SiC) ceramics, achieving precise viscosity control is critical for optimizing printability and structural integrity of printed components. Conventionally, organic binders have been employed to modify slurry viscosity; however, these additives necessitate subsequent removal, and complicating post-processing that potentially impacts final material properties. This study explores an alternative approach by systematically manipulating slurry pH and dispersant concentration to achieve desired viscosity levels without the use of additional binders. By deliberately inducing controlled under- or over-dispersion states within SiC slurries, viscosity and yield stress can be finely tuned to optimal DIW processing parameters. Rheological measurements combined with zeta potential analysis clarify the relationship between slurry stability, particle interactions, and resultant flow behavior. Adjusting the slurry pH into the acidic range protonates polyethyleneimine (PEI), initially enhancing dispersant absorption; however, further acidification leads to absorption loss. Conversely, when the solution becomes more basic, slurry stability begins to decrease. This binder-free approach not only simplifies the processing sequence but also preserves the purity and mechanical properties of the final ceramic components, representing a significant advancement in additive manufacturing of SiC-based materials.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additive Manufacturing of Oxide and Non-Oxide Ceramics for Functional and Structural Applications
Advanced Manufacturing and Densification Techniques for Fabricating Ceramic Matrix Composites
Atomic Layer Deposition (ALD) for Nanoscale SiC AM Feedstock Improvement
Colloidal Material Design for Additively Manufacturing Optical Glasses
Development of Aluminium Coating via DC Pulse Electrophoretic Deposition on Inconel 625 Particles for High-Temperature Applications
Development of Direct Ink Write Radially Graded Alumina/Zirconia
Development of Models for Densification and Microstructural Evolution of Ceramic Green Bodies Produced by Direct Ink Writing
Effect of Bimodal Powder on the Densification of a Green Body via Binder Jetting
Effect of Dispersants on the Direct Ink Write Printability of SiC Powder in Phenolic Resin for Sintered SiC
Engineering the Physicochemical Characteristics of Additively Manufactured Ceramics
Expanding Laser Powder Bed Fusion to Functional Ceramics: Bulk Mo₂C Cathodes for Catalysis
Extrusion Manufacturing (Direct Ink Write) of Carbon-Loaded Ultra-High Temperature Ceramic Matrix Composites
Functional Defects in Advanced Ceramics Fabricated by Selective Laser Sintering
Influence of Compositional and Structural Design on the Quasi-Static and Dynamic Performance of Additively Manufactured Silica-Based Ceramics
Metal Elements Doped Negative Poisson's Ratio Based Structural SiOC Polymer-Derived Ceramic to Activate Efficient Pressure and High-Temperature Difunctional Detection Performance
Multi-Material Direct Ink Writing for Ceramic Nuclear Fuel Applications
Multiphysics Modeling of Volumetric Additive Manufacturing with Microwave Beamforming for Ceramic 3D Printing
Photonic Curing of Chemically Bonded Phosphate Ceramics (CBPC) via Flash Lamp Annealing and the Effect of Optical Absorbers on the Reaction Kinetics and Microstructure
Plasma Jet Oxidation of Additively Manufactured Monolithic and High Entropy Ultra High Temperature Ceramic Carbides
Powder Behavior Simulation for Ceramic Additive Manufacturing: Enhancing Process Understanding and Material Performance
Promoting Melting and Solidification of Aluminum Nitride Through Laser Powder Bed Fusion
Tailoring Material Properties of 3D Printed Alumina Through DLP Printing and Firing Parameters
Three-Dimensional Printing of Hierarchically Porous Ceramics for Multifunctional Applications
Towards Microwave Volumetric Additive Manufacturing for Ceramics: Beamforming Experiments
Understanding Slurry Degradation in Digital Light Processing of High Refractive Index Ceramics
Versatile Ceramic Slurry Formulations for Photopolymerization-Based Additive Manufacturing
Viscosity Adjustment Without Binder

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