About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Minimizing Drying Defects for Large-Scale Parts Fabricated by Ceramic On-Demand Extrusion |
Author(s) |
Abid Hasan Rafi, David Lipke, Jeremy L. Watts, Greg Hilmas, Ming C. Leu |
On-Site Speaker (Planned) |
Abid Hasan Rafi |
Abstract Scope |
Fabricating large-scale solid ceramic parts via material extrusion remains challenging due to uneven drying, warping, and cracking of printed layers over extended printing times. This study addresses these challenges by investigating and mitigating issues arising from the continuous drying of deposited ceramic paste. Using a ceramic aqueous paste made of ZrB2/SiC (70/30 by vol.%), the Ceramic On-Demand Extrusion (CODE) process was employed. Large-scale parts with larger surface areas and reduced paste flow rates contribute to drying defects caused by uneven water evaporation. This study explored water evaporation behavior across various flow rates, surface areas, and printing patterns of deposited layers. The optimal flow rate was determined to prevent these defects on printed layers. Additionally, the role of build plate material in drying behavior was examined, with changes to build plate conditions significantly enhancing the prevention of warping and shape deformations in large-scale solid ceramic parts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |