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MM: Fachverband Metall- und Materialphysik
MM 34: Mechanical Properties and Alloy Design: e.g. Light-Weight, High-Temperature, Multicomponent Materials II
MM 34.4: Vortrag
Mittwoch, 20. März 2024, 11:00–11:15, C 230
Structural Characterisation of Nanoporous Copper — •Prabhu Prasad Biswal1, Samuel Graf2, Marlene Eichlseder3, Fernando Gustavo Warchomicka3, Fabio Blaschke4, Maximilian Fuchs1, Eduardo Machado Charry1, Alexander Bottaro1, Karin Zojer1, Roland Resel1, and Eva-Maria Steyskal2 — 1Institute of Solid State Physics, Graz University of Technology — 2Institute of Materials Physics, Graz University of Technology — 3Institute of Materials Science, Joining and Forming, Graz University of Technology — 4Institute of Chemical Engineering and Environmental Technology, Graz University of Technology
Nanoporous metals are metals with features in the pore structure in the range of 100 nm or less. Nanoporous copper (np-Cu) has recently attracted attention as an alternative to nanoporous gold or platinum. Our np-Cu is prepared by in-situ alloying of aluminium and copper using a 3D laser printer, followed by annealing at 530° C, and a subsequent de-alloying process to remove aluminium. The structural properties of the prepared Al-Cu alloy and np-Cu, including morphology, crystal structures, and chemical composition were systematically compared using X-ray diffraction and X-ray fluorescence spectroscopy; scanning electron microscopy provides surface topography and composition. In addition, the pore size distribution and internal surface area of np-Cu are quantified using micro-computed tomography and mercury intrusion porosimetry. After de-alloying, domains retain their spatial position and extension while their composition changes.
Keywords: Nanoporous Metals; 3D Printing; X-Ray Analysis; Dealloying; Scanning Electron Microscopy