2023
DOI: 10.3390/ma16083162
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New Partially Water-Soluble Feedstocks for Additive Manufacturing of Ti6Al4V Parts by Material Extrusion

Abstract: In this work, a process chain for the realization of dense Ti6Al4V parts via different material extrusion methods will be introduced applying eco-friendly partially water-soluble binder systems. In continuation of earlier research, polyethylene glycol (PEG) as a low molecular weight binder component was combined either with poly(vinylbutyral) (PVB) or with poly(methylmethacrylat) (PMMA) as a high molecular weight polymer and investigated with respect to their usability in FFF and FFD. The additional investigat… Show more

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Cited by 4 publications
(10 citation statements)
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“…For successful process chain development, the glass filler load was raised up to 60 Vol%, which is helpful in sintering. This solid load increase generally results in a melt viscosity increase [ 28 ]. For this reason, the PEG/PMMA ratio was shifted to higher PEG amounts, which causes a viscosity drop and facilitates compounding.…”
Section: Resultsmentioning
confidence: 99%
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“…For successful process chain development, the glass filler load was raised up to 60 Vol%, which is helpful in sintering. This solid load increase generally results in a melt viscosity increase [ 28 ]. For this reason, the PEG/PMMA ratio was shifted to higher PEG amounts, which causes a viscosity drop and facilitates compounding.…”
Section: Resultsmentioning
confidence: 99%
“…This can be attributed to the shorter, less entangled molecular chains of PEG 8000 compared to PEG 20,000 enabling a better polymer chain sliding at elevated temperatures, which leads to lower viscosity at a given temperature ( Figure 3 b). The influence of the PEG’s average molecular mass on compounding and melt rheology was also observed in feedstocks containing Ti alloy [ 28 ]. The impact of increasing SA amounts on the melt viscosity is more pronounced than that of the PEG’s M W variation.…”
Section: Resultsmentioning
confidence: 99%
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