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Meeting MS&T24: Materials Science & Technology
Symposium Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
Presentation Title Optimizing SiC Slurries for Robocasting High-Performance SiC.
Author(s) Cooper A. Howard, Josh Robinson, Scott Misture
On-Site Speaker (Planned) Cooper A. Howard
Abstract Scope Refractory boron compounds and phenolic resins are commonly used together as sintering aids for silicon carbide. Oxides of boron are not typically used due to their volatility at sintering temperatures. To investigate the role of boric acid-phenolic resin complexes as possible sintering aids, slurries were made using aqueous solutions of resol phenolic resin, Washington Mills FPG silicon carbide powders, and varied boron sources, including H3BO3, B4C, BN, and amorphous boron. Boron complexation and bonding were investigated using NMR, IR, and Raman spectroscopy. Test parts included pressed pellets of dried granulated slurry, and hollow robocast samples produced using nozzle diameters <1 mm. Samples were debinded in Ar/4% H2, then pressureless sintered at 2200 C in argon. Sample densities were determined through geometric and Archimedes density measurements, routinely exceeding 95% of theoretical density. Initial results indicate boric acid-phenolic resin based compositions provide enhanced densification compared to typical boron sources.


Dense Complex Shape Ceramic Components Fabricated By Digital Light Printing (DLP) and Liquid Silicon Infiltration (LSI)
Densification and Microstructure Evolution of Alumina Structures via Direct Ink Writing
Density Improvement of Binder Jet Printed MnZn Ferrite Cores via Pre-and Post- Sintering Improvement Strategies
Direct Ink Writing of SiOC Structure from Preceramic Polymer containing Inactive Fillers
Dispersion of PMN-PZT for Direct Ink Writing
Fused Filament Fabrication of Ceramic Matrix Composite Preforms Via Thermo-Oxidative Stabilization of Polyetheretherketone
Influence of Printing Parameters on the Stability and Quality of 3D Printed Geopolymers from Copper Mine Tailings
Interface Stability of Iron-Carbide Materials Fabricated via Laser-Direct Energy Deposition
Irradiative Ceramization of Chemically Bound Phosphate Ceramics (CBPCs) to Enable Direct Additive Manufacturing of Ceramic Composites
Laser-Directed Energy Deposition Additive Manufacturing of Lunar Highlands Simulant (LHS-1) Lunar Regolith Simulant for In Situ Resource Utilization
Multi Ceramic Additive Manufacturing Based on Novel Digital Light Processing Technology
Optimizing SiC Slurries for Robocasting High-Performance SiC.
Rapid Volumetric Microwave Curing of Silicon Nitride Ceramic Binder Mixtures
Stabilization of Alumina Dispersed Slurry by Controlling pH
Towards Direct Additive Manufacturing of Bulk Ceramics Using Selective Laser Flash Sintering
Use of 2D Ti3C2 MXene as an Additive in SiC and Their High-Temperature Phase Behavior
Using Laser Ultrasonics to Correlate Young’s Modulus to Particle Neck Size in Early-Stage Sintering

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