Characterizing the feasibility of processing wet granular materials to improve rheology for 3D printing
| Autor: | Loudon L. Campbell, Michelle L. Pantoya, Gordon F. Christopher, Jeffrey Hanson, Michael A. Sweeney |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Shear thinning 010304 chemical physics business.industry Mechanical Engineering 3D printing Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology Granular material 01 natural sciences Rheology Mechanics of Materials visual_art 0103 physical sciences Solid mechanics visual_art.visual_art_medium General Materials Science Extrusion Ceramic 0210 nano-technology Process engineering business Mass fraction |
| Zdroj: | Journal of Materials Science. 52:13040-13053 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-017-1404-z |
| Popis: | Rheological measurements and extrusion tests are used to evaluate the viability of high mass fraction (80% solids content) wet granular materials for extrusion-based 3D printing. Such materials have diverse applications from making dense, strong ceramic custom parts to 3D printing uniquely shaped energetic materials. Traditionally, 3D-printed colloidal materials use much lower mass fraction inks, and hence, those technologies will not work for systems requiring higher mass fraction solids content. These wet granular materials are highly non-Newtonian presenting non-homogenous flows, shear thinning, yield stress, and high elasticity. Such behaviors improve some aspects of print quality, but make printing very difficult. In this work, the relationship between the rheological behavior of wet granular materials and the processing parameters that are necessary for successfully extruding these materials for printing is examined. In the future, such characterizations will provide key indicators on how to alter printer design/operating conditions and adjust material behavior in order to improve printability. This study is a fundamental first step to successfully developing 3D printing technology of wet granular materials. |
| Databáze: | OpenAIRE |
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