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Any references for 99.9% density with SLM copper? My understanding is that pure copper SLM printing is less frequently done as doesn’t work well with the infrar

by tbenst 2y ago

Any references for 99.9% density with SLM copper? My understanding is that pure copper SLM printing is less frequently done as doesn’t work well with the infrared lasers on most machines, requires high heat & speed, and has more porosity than other alloys. It’s also hard to print so that it’s strong, conductive and heat stable. I think there’s still quite active research in the area, though, and no doubt there’s a lot going on that I don’t know! https://www.sciencedirect.com/science/article/pii/S0264127523004380 https://www.sciencedirect.com/science/article/pii/S026412752... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10861549/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10861549/

ju-st 2y ago
Sorry I wasn't talking about density but the copper content of a powder which is printable. Googling a bit I found this presentation from 2022 showing that a density of 99.5% for pure copper is possible although at half the productivity of a copper alloy https://www.coppercouncil.org/wp-content/uploads/2022/02/TS22-Thielmann.pdf https://www.coppercouncil.org/wp-content/uploads/2022/02/TS2...
FrostKiwi 2y ago
> doesn’t work well with the infrared lasers The copper use-case is what kick-ed off an industry-wide race towards offering blue laser as an option. There is more than just wavelength that goes into printing good copper results, but that is a major factor.