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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 ZrB<sub>2</sub>-SiC Heat Exchanger Geometries by Ceramic on Demand Extrusion
Author(s) Nicholas M. Timme, Marharyta Lakusta, Jeremy L Watts, Gregory E Hilmas, William G Fahrenholtz, Ming C Leu, David W Lipke
On-Site Speaker (Planned) Nicholas M. Timme
Abstract Scope Zirconium diboride (ZrB<sub>2</sub>) belongs to a group of materials known as ultra-high temperature ceramics (UHTCs), which are characterized by melting temperatures exceeding 3000C. Incorporation of silicon carbide (SiC) with ZrB<sub>2</sub> has shown to increase the strength, fracture toughness, and oxidation resistance. These materials are being investigated to produce heat exchangers intended for use in supercritical carbon dioxide (CO<sub>2</sub>) Brayton cycles operating at up to 1100C and 250 bar because of their high thermal stability and thermal conductivity at this temperature.In the present work, a ZrB<sub>2</sub>-SiC paste was developed for dual-extrusion in the Ceramic on Demand Extrusion (CODE) process with an organic fugitive material. This process was used to produce geometries with continuous through channels, which were then pressurelessly densified to greater than 95% theoretical density. This presentation will examine the development and characterization of microchannel-style heat exchanger geometries produced via CODE and the constituent materials used for their manufacturing.
Proceedings Inclusion? Planned: Other (journal publication, etc.; describe below)


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
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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