About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Additive Manufacturing of Complex Ultra-High Temperature Ceramic Parts via Hybrid Material Extrusion |
Author(s) |
Ian Ho, Hui-Chun Yu, Carolina Tallon, Christopher Williams |
On-Site Speaker (Planned) |
Ian Ho |
Abstract Scope |
While additive manufacturing (AM) of zirconium diboride (ZrB₂), an ultra-high temperature ceramic (UHTC), has been demonstrated, it remains underexplored due to challenging processing conditions and complex systems and materials needed. MEX-CRB printing of ZrB₂ is limited by ink viscosity, large nozzle diameters, and part slumping, while VPP faces challenges due to the high absorbance and refractive index of the ceramic powder. In this work, a novel hybrid MEX-CRB/MEX-TRB process for fabricating complex ZrB₂ parts is presented. Each layer has a MEX-TRB printed thermoplastic shell defining intricate geometries, followed by MEX-CRB deposition of highly loaded ZrB₂ inks. Post-processing pyrolyzes the shell and polymer binder and densifies the ceramic particles. This hybrid MEX-CRB/MEX-TRB approach relaxes ceramic ink rheological constraints and enables printing shapes unachievable through conventional methods. The influence of toolpathing on cavity filling is studied, and the process demonstrates enhanced geometric freedom for complex ZrB₂ parts advancing UHTC manufacturing for extreme applications. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |