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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Frankberg, Erkka
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Enabling fast debinding of ceramic vat photopolymerization prints with supercritical carbon dioxide as a solventcitations
- 2024Vat photopolymerization of biomimetic bone scaffolds based on Mg, Sr, Zn-substituted hydroxyapatitecitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2022Young Ceramists in the Spotlight
- 2020Investigation of corrosion and high temperature oxidation of promising ATF cladding materials in the framework of the Il trovatore project
- 2019Highly ductile amorphous oxide at room temperature and high strain ratecitations
- 2019Three-dimensional printing of zirconia: characterization of early stage material propertiescitations
- 2019Three-dimensional printing of zirconia: characterization of early stage material propertiescitations
Places of action
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article
Enabling fast debinding of ceramic vat photopolymerization prints with supercritical carbon dioxide as a solvent
Abstract
<p>Thermal debinding of 3D-printed ceramics that include a large fraction of polymeric binders, can take several days to perform, and often includes a long thermal pre-conditioning step. In addition, means to reduce the manufacturing time are limited. This applies for thermal debinding of dense ceramics, such as dental restorations, that have been printed using vat photopolymerization (VPP) based technologies. The thermal debinding of such ceramics can be made faster, more economical, and more ecological by extracting selected slurry components prior to thermal debinding. Thus, creating flow channels for pyrolysis gases originating from the remaining binder polymers to exit the material. Here, supercritical carbon dioxide (scCO<sub>2</sub>) extraction was used to create such gas flow channels and to study which slurry components can be dissolved from VPP printed polymeric and ceramic/polymeric parts without significant delamination, cracking, or part deformation. The scCO<sub>2</sub> extraction resulted in the creation of significant 33 vol% of nanosized porosity in a pure polymeric as-built print, and 21 vol% of nanosized porosity in a ceramic/polymeric composite print, where the ceramic powder remains in the part. These gas flow channels may allow faster thermal debinding while avoiding the creation of other defects. In the process, 90 wt.-% of the dissolvable resin fraction was extracted from the ceramic/polymeric prints already in 2 h without significant delamination, while 70 wt.-% of the dissolvable resin fraction was extracted in 2 h from the pure polymeric prints as a reference. This presents a novel, successful demonstration of a chemistry that allows both VPP printing and scCO<sub>2</sub> extraction.</p>