Influence of binder composition and material extrusion (MEX) parameters on the 3D printing of highly filled copper feedstocks
العنوان: | Influence of binder composition and material extrusion (MEX) parameters on the 3D printing of highly filled copper feedstocks |
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المؤلفون: | Mahrukh Sadaf, Santiago Cano, Joamin Gonzalez-Gutierrez, Mario Bragaglia, Stephan Schuschnigg, Christian Kukla, Clemens Holzer, Lilla Vály, Michael Kitzmantel, Francesca Nanni |
المصدر: | Polymers, vol. 14, no. 22, 4962, 2022. Polymers; Volume 14; Issue 22; Pages: 4962 |
بيانات النشر: | MDPI, 2022. |
سنة النشر: | 2022 |
مصطلحات موضوعية: | baker, material extrusion, iztiskanje materiala, Polymers and Plastics, copper, kovine, metals, additive manufacturing, material extrusion (MEX), General Chemistry, udc:620.1:699, dodajalna proizvodnja |
الوصف: | This work aims to better understand the type of thermoplastic binders required to produce highly loaded copper filaments that can be successfully printed via low-cost filament-based material extrusion (MEX). Compounding feedstock material with 55 vol.% of copper and three multi-component binder systems has been performed. The MEX behavior of these feedstocks was evaluated by depositing material at different speeds and appropriately selecting the extrusion temperature depending on the binder composition. The rest of the MEX parameters remained constant to evaluate the printing quality for the different feedstocks. Printable filaments were produced with low ovality and good surface quality. The filaments showed good dispersion of the powder and polymeric binder system in SEM analysis. The feedstock mechanical properties, i.e., the tensile strength of the filament, were sufficient to ensure proper feeding in the MEX machine. The viscosity of the feedstock systems at the adjusted printing temperatures lies in the range of 102–103 Pa·s at the shear rate of 100–1000 s−1, which appears to be sufficient to guarantee the correct flowability and continuous extrusion. The tensile properties vary greatly (e.g., ultimate tensile strength 3–9.8 MPa, elongation at break 1.5–40.5%), and the most fragile filament could not be reliably printed at higher speeds. Micrographs of the cross-section of printed parts revealed that as the printing speed increased, the porosity was minimized because the volumetric flow of the feedstock material increased, which can help to fill pores. This study offers new insights into the feedstock requirements needed to produce low-cost intricate copper components of high quality in a reliable and efficient manner. Such components can find many applications in the electronics, biomedical, and many other industries. |
وصف الملف: | application/pdf; text/url |
اللغة: | English |
تدمد: | 2073-4360 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb5b89a767484d13985aae731e964d66 https://repozitorij.uni-lj.si/Dokument.php?id=164537&dn= |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....fb5b89a767484d13985aae731e964d66 |
قاعدة البيانات: | OpenAIRE |
تدمد: | 20734360 |
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