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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 Towards Direct Additive Manufacturing of Bulk Ceramics Using Selective Laser Flash Sintering
Author(s) Desiderio Kovar
On-Site Speaker (Planned) Desiderio Kovar
Abstract Scope Additive manufacturing of ceramics is usually performed indirectly utilizing a polymer binder to fuse ceramic particles. The removal of the polymer can be impractically slow for large ceramic parts. Selective laser flash sintering (SLFS) uses a combination of an electric field and local heating from a scanning laser to directly fuse particles directly to each other by the formation of particle necks and without the need for a polymer. The combination of laser heating and subsequent Joule heating lead to runaway temperatures and thermal shock cracking during SLFS. Thus, a key challenge is detecting the onset of particle necking and then reducing the electric field before runaway and cracking occurs. We have developed a non-destructive laser acoustic technique to detect the onset of particle necks and are investigating strategies for passively and dynamically controlling electric field to control runaway. Results will be presented for a AlN, LaCrO3-based ceramics, and YSZ.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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