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MM: Fachverband Metall- und Materialphysik
MM 9: Poster
MM 9.55: Poster
Montag, 17. März 2025, 18:30–20:30, P1
An X-ray diffraction study of copper powder for laser-based powder bed fusion — •Eric Schneider1, Robert Ortmann2, Julia Frank3, Fabienne Hellwig3, Tobias Grimm2, Michael Blüm3, Lena Friedrich1, Michael Paulus1, Jaqueline Savelkouls1, Jan T. Sehrt2, Christian Sternemann1, and Arne Röttger3 — 1Universität TU Dortmund, Maria-Goeppert-Mayer-Straße 2, D-44227 Dortmund — 2Ruhr-Universität Bochum, Universitätsstraße 150, D-44801 Bochum — 3Bergische Universität Wuppertal, Bahnhofstraße 15, D-42651 Solingen
Additive manufacturing (AM) of components using laser-based powder bed fusion of metals (PBF-LB/M) has reached market maturity. This layer-by-layer process offers advantages over casting and subtractive methods, especially for producing complex parts with internal cavities and is promising to produce topology-optimized lightweight structures. However, the use of copper powders for PBF-LB/M based AM poses challenges due to its high thermal conductivity and reflectivity. The directed oxidation and reduction of the copper particle surfaces can improve both, the powders processability and reusability. In this study we investigate the oxidation of pre-treated copper powders in air and its controlled reduction using Ar/2%H2 atmosphere at different temperature conditions up to 350∘C by X-ray diffraction at beamline BL9 of DELTA synchrotron radiation source in order to reveal information about induction times and change in Cu, Cu2O, and CuO phase composition for industrial processing. This research is funded by the DFG via projects RO 4523/9-1, SE 2935/6-1, and STE 1079/9-1.
Keywords: Copper; PBF-LB/M; Oxidation; Reduction; X-ray diffraction