Regensburg 2025 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 36: Mechanical Properties
MM 36.4: Vortrag
Freitag, 21. März 2025, 11:00–11:15, H23
Phase identification by Raman Spectroscopy on pre-oxidized AISI 316L-MgO composite produced by Spark Plasma Sintering — •Julia Richter1, Mahnaz Mehdizadehlima2, Cameliu Himcinschi1, and Jens Kortus1 — 1TU Bergakademie Freiberg, Institut für Theoretische Physik, Leipziger Straße 23, D-09599 Freiberg — 2TU Bergakademie Freiberg, Institut für Werkstoffwissenschaft, Gustav-Zeuner-Straße 5, D-09599 Freiberg
Re-usage, recycling and upcycling of MgO-C refractories as they are widely used in the steel industry are crucial for resource efficiency. Our upcycling concept is aimed at steel-MgO composite anodes for application in the extraction of aluminum by fused-salt electrolysis. The composite anode material is produced by Spark Plasma Sintering based on 60 vol.% AISI 316L steel powder and 40 vol.% MgO. In this stage of development, the raw material is fused fresh MgO instead of recyclate as a proof of concept. Pre-oxidation treatment of the developed composite is intended to enhance the material's corrosion resistance in the aggressive environment of molten cryolite during application. In order to gain a better understanding of the oxidation behavior at different temperatures, phase identification is required. For this purpose, Raman spectroscopy as a sensitive, non-destructive, non-contact method is employed complementary to other investigative techniques; e.g., Scanning Electron Microscopy.
Keywords: Raman Spectroscopy; Spark Plasma Sintering; Scanning Electron Microscopy; Refractory; Composite