{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T21:44:24Z","timestamp":1775771064444,"version":"3.50.1"},"reference-count":29,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2022,8,10]],"date-time":"2022-08-10T00:00:00Z","timestamp":1660089600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Funds through the FCT\u2014Portuguese Foundation for Science and Technology","award":["UIDB\/05256\/2020"],"award-info":[{"award-number":["UIDB\/05256\/2020"]}]},{"name":"National Funds through the FCT\u2014Portuguese Foundation for Science and Technology","award":["UIDP\/05256\/2020"],"award-info":[{"award-number":["UIDP\/05256\/2020"]}]},{"name":"National Funds through the FCT\u2014Portuguese Foundation for Science and Technology","award":["UIDB\/04436\/2020"],"award-info":[{"award-number":["UIDB\/04436\/2020"]}]},{"name":"Portuguese Foundation for Science and Technology (FCT)","award":["UIDB\/05256\/2020"],"award-info":[{"award-number":["UIDB\/05256\/2020"]}]},{"name":"Portuguese Foundation for Science and Technology (FCT)","award":["UIDP\/05256\/2020"],"award-info":[{"award-number":["UIDP\/05256\/2020"]}]},{"name":"Portuguese Foundation for Science and Technology (FCT)","award":["UIDB\/04436\/2020"],"award-info":[{"award-number":["UIDB\/04436\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In the Selective Laser Sintering (SLS) technique, the great majority of the powder involved is not included in the final printed parts, being just used as a support material. However, the quality of this powder is negatively affected during the process since it is subjected to high temperatures (close to its melting temperature) during a long time, i.e., the printing cycle time, especially in the neighborhood of the printed part contour. This type of powder is relatively expensive and large amounts of used powder result after each printing cycle. The present paper focuses on the reuse of Polyamide 12 (PA 12) powder. For this sake, the same PA 12 powder was used in consecutive printing cycles. After each cycle, the remaining non-used powder was milled and filtered before subsequent use. Properties of the powder and corresponding prints were characterized in each cycle, using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), computed tomography (CT), and tensile tests. It was concluded that subjecting the same powder to multiple SLS printing cycles affects the properties of the printed parts essentially regarding their morphology (voids content), mechanical properties reproducibility, and aesthetical aspect. However, post-processing treatment of the powder enabled to maintain the mechanical performance of the prints during the first six printing cycles without the need to add virgin powder.<\/jats:p>","DOI":"10.3390\/ma15165486","type":"journal-article","created":{"date-parts":[[2022,8,10]],"date-time":"2022-08-10T04:20:32Z","timestamp":1660105232000},"page":"5486","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["On the Reuse of SLS Polyamide 12 Powder"],"prefix":"10.3390","volume":"15","author":[{"given":"Pedro C.","family":"Gomes","sequence":"first","affiliation":[{"name":"IPC\/LASI\u2014Institute for Polymers and Composites, University of Minho, 4800-058 Guimar\u00e3es, Portugal"},{"name":"CMEMS\u2014Center for MicroElectroMechanical Systems, University of Minho, 4800-058 Guimar\u00e3es, Portugal"},{"name":"LABBELS\u2014Associate Laboratory, 4800-058 Guimar\u00e3es, Portugal"},{"name":"NM3D Ib\u00e9rica\u2014Sistemas de Metrologia Industrial, 4920-071 Vila Nova de Cerveira, Portugal"}]},{"given":"Oscar G.","family":"Pi\u00f1eiro","sequence":"additional","affiliation":[{"name":"NM3D Ib\u00e9rica\u2014Sistemas de Metrologia Industrial, 4920-071 Vila Nova de Cerveira, Portugal"}]},{"given":"Alexandra C.","family":"Alves","sequence":"additional","affiliation":[{"name":"CMEMS\u2014Center for MicroElectroMechanical Systems, University of Minho, 4800-058 Guimar\u00e3es, Portugal"},{"name":"LABBELS\u2014Associate Laboratory, 4800-058 Guimar\u00e3es, Portugal"},{"name":"IBTN\/Euro\u2014European Branch of the Institute of Biomaterials, Tribocorrosion and Nanomedicine, Department of Mechanical Engineering, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5384-0028","authenticated-orcid":false,"given":"Olga S.","family":"Carneiro","sequence":"additional","affiliation":[{"name":"IPC\/LASI\u2014Institute for Polymers and Composites, University of Minho, 4800-058 Guimar\u00e3es, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"435","DOI":"10.1243\/0954405991516912","article-title":"Selective laser sintering: Applications and capabilities","volume":"213","author":"Pham","year":"1999","journal-title":"Proc. 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