Evaluating Ceramic Powder Flow and Shrinkage for Binder Jetting in Heritage Artifact Fabrication
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The integration of digital manufacturing and ceramic engineering presents transformative opportunities for tailoring ceramicproperties through process optimization. This study investigates the influence of powder morphology and process parameterson the printability and performance of alumina (Al2O3) components fabricated via binder jetting. Alumina powders withvaried particle shapes and size distributions were characterized for shape factor, flow rate, and bulk properties to assess theirsuitability for layer-wise deposition. Print accuracy and resolution were evaluated by fabricating geometrically standardizedspecimens, followed by dimensional analysis using 3D scanning. Experimental results reveal a direct correlation betweenflow rate and dimensional fidelity, while powders with higher shape factors (closer to spherical) exhibit improved flowabilityand uniform spreading. Post-sintering analysis was conducted to examine density, shrinkage, porosity, and mechanicalstrength. Graphical data are presented to illustrate relationships such as shape factor vs. angle of repose, flow rate vs. print accuracy, and sintering temperature vs. final part density. The findings provide a comprehensive understanding ofhow powder characteristics and digital process control can be leveraged to enhance the precision and quality of 3D-printedalumina ceramics.
Abstract
The integration of digital manufacturing and ceramic engineering presents transformative opportunities for tailoring ceramicproperties through process optimization. This study investigates the influence of powder morphology and process parameterson the printability and performance of alumina (Al2O3) components fabricated via binder jetting. Alumina powders withvaried particle shapes and size distributions were characterized for shape factor, flow rate, and bulk properties to assess theirsuitability for layer-wise deposition. Print accuracy and resolution were evaluated by fabricating geometrically standardizedspecimens, followed by dimensional analysis using 3D scanning. Experimental results reveal a direct correlation betweenflow rate and dimensional fidelity, while powders with higher shape factors (closer to spherical) exhibit improved flowabilityand uniform spreading. Post-sintering analysis was conducted to examine density, shrinkage, porosity, and mechanicalstrength. Graphical data are presented to illustrate relationships such as shape factor vs. angle of repose, flow rate vs. print accuracy, and sintering temperature vs. final part density. The findings provide a comprehensive understanding ofhow powder characteristics and digital process control can be leveraged to enhance the precision and quality of 3D-printedalumina ceramics.