New feedstock system for fused filament fabrication of sintered alumina parts

Abstract: Only a few 3D-printing techniques are able to process ceramic materials and exploit successfully the capabilities of additive manufacturing of sintered ceramic parts. In this work, a new two component binder system, consisting of polyethyleneglycol and polyvinylbutyral, as well stearic acid as surfactant, was filled with submicron sized alumina up to 55 vol.% and used in fused filament fabrication (FFF) for the first time. The whole process chain, as established in powder injection molding of ceramic parts, starting with material selection, compounding, measurement of shear rate and temperature dependent flow behavior, filament fabrication, as well as FFF printing. A combination of solvent pre-debinding with thermal debinding and sintering at a reduced maximum temperature due to the submicron sized alumina and the related enhanced sinter activity, enabled the realization of alumina parts with complex shape and sinter densities around 98 % Th. Finally the overall shrinkage of the printed parts were compared with similar ones obtained by micro ceramic injection molding

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
Materials. - 13, 19 (2020) , 4461, ISSN: 1996-1944

Schlagwort
3D-Druck
Rapid Prototyping
Aluminiumoxide
Verbundwerkstoff
Fused Deposition Modeling

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2020
Urheber
Noetzel, Dorit
Hanemann, Thomas

DOI
10.3390/ma13194461
URN
urn:nbn:de:bsz:25-freidok-1676455
Rechteinformation
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Letzte Aktualisierung
25.03.2025, 13:51 MEZ

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  • 2020

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