Solid epoxy for functional 3D printing with isotropic mechanical properties by material extrusion

Drücker, Sven; Voormann, Hauke; Berg, Karl-Philipp von; Ahrens, Maximilian Wilhelm Heinrich; Wisniewski, Valea Kim; Schröder, Eike; Kehne, Andreas; Detjen, Sönke; Kaysser, Simon T.; Keun, Christian-André; Fiedler, Bodo

doi:10.1016/j.addma.2022.102797

Cited by 4 publications

(3 citation statements)

References 47 publications

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“…To reduce contact resistance, two 2 mm wide strips of EMS#12640 silver paste were applied to each end of the sample. Colloidal silver paste is one of most used techniques to reduce the contact resistance of additively manufactured conductive structures [ 4 , 10 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. The voltage drop was measured with a Keithley 2460 Sourcemeter (Keithley Instruments, Solon, OH, USA) via the two inner measuring contacts at a distance of 42 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The MEX specimens were fabricated on a microscope slide in a single layer, fill pattern orientation of 0° in the direction of current flow. To reduce contact resi two 2 mm wide strips of EMS#12640 silver paste were applied to each end of the s Colloidal silver paste is one of most used techniques to reduce the contact resista additively manufactured conductive structures [4,10,[32][33][34][35][36][37][38]. The voltage dro measured with a Keithley 2460 Sourcemeter (Keithley Instruments, Solon, OH, US the two inner measuring contacts at a distance of 42 mm.…”

Section: Resistivity Measurementmentioning

confidence: 99%

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Influence of Manufacturing Process on the Conductivity of Material Extrusion Components: A Comparison between Filament- and Granule-Based Processes

Nowka,

Hilbig,

Schulze

et al. 2024

Polymers

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The additive manufacturing of components using material extrusion (MEX) enables the integration of several materials into one component, including functional structures such as electrically conductive structures. This study investigated the influence of the selected additive MEX process on the resistivity of MEX structures. Specimens were produced from filaments and granules of an electrically conductive PLA and filled with carbon nanotubes and carbon black. Specimens were produced with a full-factorial variation of the input variables: extrusion temperature, deposition speed, and production process. The resistivity of the specimens was determined by four-wire measurement. Analysis of the obtained data showed that only the extrusion temperature had a significant influence on the resistivity of the MEX specimens. Furthermore, the impact of the nozzle diameter was evaluated by comparing the results of this study with those of a previous study, with an otherwise equal experimental setup. The nozzle diameter had a significant influence on resistivity and a larger nozzle diameter reduced the mean variance by an order of magnitude. The resistivity was lower for most process parameter sets. As the manufacturing process had no significant influence on the resistivity of MEX structures, it can be selected based on other criteria, e.g., the cost of feedstock.

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Section: Methodsmentioning

confidence: 99%

Section: Resistivity Measurementmentioning

confidence: 99%

Influence of Manufacturing Process on the Conductivity of Material Extrusion Components: A Comparison between Filament- and Granule-Based Processes

Nowka,

Hilbig,

Schulze

et al. 2024

Polymers

View full text Add to dashboard Cite

show abstract

“…As a rapid prototyping technology based on digital model files and printing devices, 13,14 3D printing can realize more efficient and complex three-dimensional monolithic structures. 15 In various 3D printing strategies, direct ink writing (DIW) technology is more suitable for forming the integral monolith of clay, which can take the shear thinning fluid slurry as the printing material to directly extrude.…”

Section: Introductionmentioning

confidence: 99%