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Meeting MS&T21: Materials Science & Technology
Symposium Additive Manufacturing of High and Ultra-High Temperature Ceramics and Composites: Processing, Characterization and Testing
Presentation Title Additive Manufacturing of High-performance Advanced Ceramics by the Ceramic On-demand Extrusion (CODE) Process
Author(s) Ming C. Leu
On-Site Speaker (Planned) Ming C. Leu
Abstract Scope Fabrication of dense ceramic parts with complex geometries by extrusion-based additive manufacturing processes is challenging due to the paste’s non-Newtonian behavior, compressibility, and inhomogeneity and the required precise control of the extrusion start and stop to dispense the paste on demand. We have developed an extrusion-based additive manufacturing process, called Ceramic On-Demand Extrusion (CODE), for fabricating highly dense ceramic components from aqueous, high-solids-loading pastes. Afterwards, the fabricated parts are dried in a humidity-controlled chamber and then sintered under atmospheric conditions. The mechanical properties of sintered samples were compared to those from conventional manufacturing processes and other ceramic additive manufacturing processes. Also investigated were sacrificial materials used to build support structures for fabricating complex ceramic components with overhangs, cooling channels, etc. For fabricating parts with functionally graded materials, a dynamic mixer and an extrusion control scheme were developed for fabricating parts with material compositions graded in real time.
Proceedings Inclusion? Planned: Other (journal publication, etc.; describe below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additive Manufacturing of Aqueous Based Silicon Nitride Suspensions via Direct Writing
Additive Manufacturing of Corrosion Resistant UHTC Materials for Chloride Salt-to-sCO2 Brayton Cycle Heat Exchangers
Additive Manufacturing of High-performance Advanced Ceramics by the Ceramic On-demand Extrusion (CODE) Process
Additive Manufacturing of Silicon Nitride Using a Slurry Approach
Additive Manufacturing of ZrB2–ZrSi2 Composites Using an Electron Beam Melting (EBM) Process
Additive Manufacturing Of ZrB2-SiC Heat Exchanger Geometries by Ceramic on Demand Extrusion
Additive Slurry Drying as a Novel Method for Realizing Large Ceramic Components Using AM
Advanced Polymer-derived (Ultra)-high-temperature Resistant Ceramics and Ceramic Nanocomposites for Additive Manufacturing
AM of UHTCs at LLNL
Binder Jet Additive Manufacturing of Novel Design, High Temperature, Ceramic Heat Exchangers
Ceramic On-demand Extrusion (CODE) of Functionally Graded ZrB2-Mo
Deposition of UHTC Coatings on Refractory Substrates by Directed Energy Methods
High Temperature Properties of Polymer-derived Ceramic Matrix Composites Fabricated via Additive Manufacturing
Innovative Route for the 3D Printing of Hybrid Silicon Carbide/Carbon Fiber Nanocomposites
Investigation of Oxidation Behavior of ZrB2-SiC Composites under Different Partial Pressures of Oxygen
Molten Chloride Salt Corrosion Testing of Ultra High Temperature Ceramics for High Temperature Heat Exchangers Fabricated by Additive Manufacturing Methods
Pathways to Additively Manufacture Ultra-high Temperature Ceramic Composites
Process Development and Optimization for The Laser Powder Bed Fusion of WC-Ni Cermet Composites
Strategies for Printing Continuous Fibers and Post-processing for Ceramic Matrix Composites (CMCs)

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