TU Bergakademie Freiberg Data Publications

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Data publications from research of Freiberg University of Mining and Technology.

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    Open Access
    Supplementary information to the publication “Influence of foam composite in lithium-ion battery packs on their mechanical recycling”
    (Technische Universität Bergakademie Freiberg, 2025-05-23) Rademacher, Paul; Kaas, Alexandra; Wilke, Christian; Peuker, Urs A.
    Supplementary data to the following paper. Lithium-ion batteries (LIB) make an important contribution to the energy transition as energy storage devices for mobile and stationary applications. The recovery of the valuable materials contained in the lithium-ion batteries after their end of life is of central importance for the development of a circular economy in line with the concept of sustainability. Mechanical recycling is to be seen as a first step in this process. With processes for the mechanical recycling of LIB that have already been successfully developed and implemented, it is possible to recover most components of a LIB i.e., the materials of the anode, cathode and separator foils as well as the casing. The concentrate of the coating of the electrode foils, which is called black mass, becomes an intermediate product for hydrometallurgical recycling processes for the recovery of lithium, among other materials. Some OEM of the automotive industry are about to introduce cell-to-pack-technologies, in which individual LIB-cells are fixed and stabilised in their position inside the large battery pack with the aid of a foam material, thereby adding further materials to the battery pack. The effects of the foam on the recycling are not known yet. Within the scope of this experimental work, several technological variants to enrich and separate the foam as an individual material fraction were investigated. The holistic aim is to minimise contamination from the foam in the valuable fractions. Two different types of foam and their effect on the purity of the recycling products were analysed.
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    Open Access
    Variable total strain amplitude loading of 316L
    (Technische Universität Bergakademie Freiberg, 2025-05-09) Szlosarek, Robert; Henkel, Sebastian; Nitzsche, Pia
    This project investigates the behaviour of steel 316L under variable total strain amplitude loading, with a focus on understanding the material's response to complex loading conditions. Quasistatic tensile testing and fully reversed constant amplitude fatigue tests were conducted to characterize the material's properties. The variable amplitude tests were performed under total strain control, and the resulting stress-strain hysteresis loops were analysed to reveal the occurrence of mean stress after a drop in strain amplitude. Notably, the sign of the mean stress depends on the direction of strain transition between the tensile and compression domains. Furthermore, an ideal plastic material behaviour was observed after strain increase accompanied by mean stress. To facilitate further research and model development, the experimental data are published in combination with a research paper: Variable strain amplitude loading of steel 316L – experimental results and analytical modelling
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    Open Access
    Particle image velocimetry inside in-axis and off-axis stretched Newtonian liquid bridges
    (Technische Universität Bergakademie Freiberg, 2025-05-06) Fritzsche, Lisa; Bauer, Katrin
    Supplemental material for the publication: "Particle image velocimetry of the flow field inside in-axis and off-axis stretched liquid bridges" by Fritzsche, L., Bauer, K., & Schwarze, R. (2025). The study introduces a novel experimental technique that enables comprehensive visualization and measurement of the internal flow field of liquid bridges throughout the stretching process. By embedding the liquid bridge in a refractive-index-matched immiscible outer liquid phase, unobstructed optical access to the entire volume is provided and optical distortions are eliminated. The data collection archived here contains the time-resolved PIV data (velocity fields) for all cases discussed in the publication, raw images for two representative cases (plate speeds 5 mm/s), and evaluated minimum diameters over time (including raw images) for liquid-air systems to compare to the liquid-liquid system of the PIV measurements.
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    Open Access
    Granule size and shape data from SOPAT for publication "Impact of Feed Rate and Binder Concentration on the Morphology of Spray Dried Alumina-Polymer Nano-composites"
    (Technische Universität Bergakademie Freiberg, 2025-04-24) Mitra, Rahul
    This dataset comprises in-line experimental SOPAT data from spray drying investigations of alumina and polyvinylpyrrolidone-30 composite granules. The spray drying process outcomes are documented through inline optical images of dried granules obtained via a SOPAT in-line imaging system providing maximum and minimum Feret diameter and aspect ratio information.
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    Open Access
    Micro-CT data for SPP 2364 "Model-based control of spray synthesis of structured granules with specified properties using transfer functions derived by multivariate stochastic models and machine learning"
    (Technische Universität Bergakademie Freiberg, 2025-04-23) Mitra, Rahul
    The data set comprises the micro-CT data from the 1st funding period of the SPP 2364, project number 504580586. The data published here contains the raw, reconstructed micro-CT images of the two spray dried samples (at two different feed rates) tested. The scans were done using the Zeiss Xradia Versa 510.