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Influence of Metallic Powder Characteristics on Extruded Feedstock Performance for Indirect Additive Manufacturing

2021-11-24Journal article Open access
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dc.contributor.authorSantos, Cyril
dc.contributor.authorGatões, Daniel
dc.contributor.authorCerejo, Fábio
dc.contributor.authorVieira, Maria Teresa
dc.date.accessioned2023-04-17T13:34:57Z
dc.date.available2023-04-17T13:34:57Z
dc.date.issued2021-11-24
dc.description.abstractMaterial extrusion (MEX) of metallic powder-based filaments has shown great potential as an additive manufacturing (AM) technology. MEX provides an easy solution as an alternative to direct additive manufacturing technologies (e.g., Selective Laser Melting, Electron Beam Melting, Direct Energy Deposition) for problematic metallic powders such as copper, essential due to its reflectivity and thermal conductivity. MEX, an indirect AM technology, consists of five steps—optimisation of mixing of metal powder, binder, and additives (feedstock); filament production; shaping from strands; debinding; sintering. The great challenge in MEX is, undoubtedly, filament manufacturing for optimal green density, and consequently the best sintered properties. The filament, to be extrudable, must accomplish at optimal powder volume concentration (CPVC) with good rheological performance, flexibility, and stiffness. In this study, a feedstock composition (similar binder, additives, and CPVC; 61 vol. %) of copper powder with three different particle powder characteristics was selected in order to highlight their role in the final product. The quality of the filaments, strands, and 3D objects was analysed by micro-CT, highlighting the influence of the different powder characteristics on the homogeneity and defects of the greens; sintered quality was also analysed regarding microstructure and hardness. The filament based on particles powder with D50 close to 11 µm, and straight distribution of particles size showed the best homogeneity and the lowest defects.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSantos, C.; Gatões, D.; Cerejo, F.; Vieira, M.T. Influence of Metallic Powder Characteristics on Extruded Feedstock Performance for Indirect Additive Manufacturing. Materials 2021, 14, 7136. https:// doi.org/10.3390/ma14237136pt_PT
dc.identifier.doi10.3390/ma14237136pt_PT
dc.identifier.issn1996-1944
dc.identifier.urihttp://hdl.handle.net/10400.8/8391
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicro-CTpt_PT
dc.subjectAdditive manufacturingpt_PT
dc.subjectMEX 1 Filamentpt_PT
dc.subjectCopperpt_PT
dc.subjectFeedstockpt_PT
dc.titleInfluence of Metallic Powder Characteristics on Extruded Feedstock Performance for Indirect Additive Manufacturingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleMaterialspt_PT
oaire.citation.volumeVol. 14, n.º 23pt_PT
person.familyNameSantos
person.givenNameCyril
person.identifier.ciencia-id2C11-6107-8C6B
person.identifier.orcid0000-0001-8155-5005
person.identifier.scopus-author-id57191992015
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication84e7cfbd-f943-43ce-82c4-2355dd1ced74
relation.isAuthorOfPublication.latestForDiscovery84e7cfbd-f943-43ce-82c4-2355dd1ced74

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