About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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Presentation Title |
Effect of Binder Content on Ceramic Paste for Additively Manufactured Parts via Ceramic On-demand Extrusion |
Author(s) |
Abid Hasan Rafi, Marharyta Lakusta, David Lipke, Jeremy Lee Watts, Greg Hilmas, Ming C. Leu |
On-Site Speaker (Planned) |
Abid Hasan Rafi |
Abstract Scope |
Ceramic On-Demand Extrusion (CODE) is an extrusion-based process to produce highly dense sintered ceramic components from aqueous pastes with low binder content. This study examines the effects of the binder amount addition and dispersion on paste printability and residual porosity of sintered parts. An aqueous paste made of ZrB2/SiC (70/30 by volume) powder with ~45 vol% solid loadings and methylcellulose binder is used. When the binder is directly added as a powder to the paste, a notable reduction in the relative density of post-processed samples is observed when the binder amount increases. This work also reports the effects of alternative homogenization procedures, including using filtered dissolved binder solutions on sintered density and pore size distributions. This study is significant for extrusion-based ceramic additive manufacturing, particularly fabricating parts with microscale features such as microchannels in compact heat exchangers, where the frequency of large pores (relative to feature sizes) must be controlled. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |