Research Data Repository of Saxon Universities
OPARA is the Open Access Repository and Archive for Research Data of Saxon Universities.
Researchers of Saxon Universities can either publish their research data on OPARA, or archive it here to comply with requirements of funding acencies and good scientic practice, without public access.
You can find the documentation of this service at the ZIH Data Compendium websites. If you need suppourt using OPARA please contact the Servicedesk of TU Dresden.
Communities in OPARA
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Recent Submissions
GRK 2802: Characterization of CrMnNi Steel Powders Obtained via Gas Atomization
(Technische Universität Bergakademie Freiberg, 2026-06-22) Sherstneva, Anastasiia; Quitzke, Caroline; Bellé, Matheus Roberto; Wendler, Marco; Volkova, Olena
To obtain a successful product during additive manufacturing, the powder as a raw material must have the high quality. The purpose of this work is to investigate CrMnNi steel powders obtained by inert gas atomization with nickel content: 3, 6, and 9 wt% and to identify dependencies between the powder size and morphology, solidification structure, and change in chemical composition and thermophysical properties. Particle size distribution is measured by a laser scattering analyzer: d50 value are 82.02, 69.32, and 75.54 μm for powders with 3, 6, and 9 wt%, respectively. Surface tension (ST) measurements are made by maximum bubble pressure method: for steels with 3, 6, and 9 wt% at temperature 1500 °C, ST is 1.01, 1.07, and 1.15 mNm 1, respectively. It is found that the change in particle size affects the chemical composition, the content of the ferromagnetic phase and secondary dendritic arm-spacing. Changes in the content of elements such as S, O, N, and Mn are determined, depending on the diameter of the particles. The influence of changes in content of S, O, and N on the thermophysical properties such as ST is investigated.
Subcellular ETC flux data in mouse oocytes under oxygen drop and temperature sweep experiments
(Technische Universität Dresden, 2026-06-19) Schwabe, Maximilian; Ilker, Efe; Yang, Xingbo
This dataset contains the data of subcellular distributions of the mitochondrial electron transport chain (ETC) flux within mouse oocytes inferred from the fluorescence lifetime imaging (FLIM) of NADH. The ETC flux distribution is obtained as a function of distance to the center of the oocyte, displaying a spatial gradient. This dataset includes the different responses of this subcellular ETC flux gradients to oxygen drop and temperature sweep perturbations of the oocytes. It contains the raw data of the ETC flux gradients across these perturbations as well as analysis of the origin of this gradient using reaction-diffusion and spatial kinetic modeling. The code used to generate and make plots from the data is available at https://github.com/MaxScw/mitoFluxGradients
Research data for: "Analyzing the 3D morphology of particle systems coated by mechano-fusion using micro-CT image data"
(Technische Universität Bergakademie Freiberg, 2026-06-17) Seyffer, Judith Miriam; Gräfensteiner, Phillip; Rieder, Philipp
This dataset contains micro-computed tomography (micro-CT) and high-resolution scanning electron microscopy (SEM) image data of alumina host particles coated with polytetrafluoroethylene (PTFE) guest particles via mechano-fusion, a dry particle coating process. The data supports quantitative analysis of 3D coating morphology using geometric descriptors including coating thickness, surface area coverage, and contact loss. Micro-CT scans of the in epoxy resin embedded particles were acquired with a Zeiss Xradia 510 Versa across two fields of view (upper and lower part) of a 1 mm × 1 mm × 2 mm sample. The dataset includes raw reconstructed image stacks alongside phase-wise, aggregate-wise, and host-only segmentation outputs generated via a hierarchical segmentation pipeline developed as part of the research. SEM images of five polished cross-sections of the same sample were acquired with a Tescan Amber using a backscattered electron detector. An ilastik pixel classification model for SEM image segmentation is also provided. This dataset is associated with the publication "Analyzing the 3D morphology of particle systems coated by mechano-fusion using micro-CT image data."
SPP 2419: Investigation of the (thermo-)mechanical properties and the chemical resistance towards ammonia combustion atmosphere of alumina-based model structures manufactured via Fused Granulate Fabrication
(Technische Universität Bergakademie Freiberg, 2026-06-17) Brachhold, Nora; Bock-Seefeld, Benjamin; Kretzler, Daniel; Heuer, Claudia; Neumann, Marc; Hubálková, Jana; Stelzner, Björn; Stein, Oliver T.; Trimis, Dimosthenis; Aneziris, Christos G.
This study focuses on the fabrication of alumina-based model samples by fused granulate fabrication for the application in burner components for ammonia combustion. Three compositions were investigated: Two alumina systems with different initial grain size (A1-tabular alumina, A2-reactive alumina) and alumina (AZT) with MgOstabilized ZrO2- and TiO2-additions. Young’s modulus and flexural strength were determined after sintering and after up to five thermal shocks. A1 exhibited the best suitability for repeated thermal shocks, followed by A3. The high interparticle porosity of A1 limited crack propagation and resulted in a slow, gradual loss in elastic modulus (maximum loss of 8.6%) and strength (maximum loss of 35.7%) with increasing number of thermal shocks. Microstructural features due to the additive manufacturing process could enhance thermal shock performance. The materials were tested in ammonia combustion atomosphere at approx. 1500 ◦C for 1 h and showed no phase alterations. Model components with application-near geometries were successfully realized.
Additional data: From Biotechnological Residues to Biodegradable Printed Circuit Boards: Aspergillus niger Mycelium as a Structural Support Material
(Technische Universität Bergakademie Freiberg, 2026-06-16) Stegbauer, Linus; Oehlsen, Nina; Wachsmann, Sebastian; Fauser, Dominik; Glauche, Florian; Laschat, Sabine; Selbmann, Franz; Steeb, Holger; Arki, Pal; Glöser-Chaoud, Simon
The electronics industry urgently seeks sustainable, biodegradable alternatives to conventional substrates for printed circuit boards (PCBs) to reduce the environmental impact of electronic waste and CO2 emissions. Here, we introduce a biobased, plastic-like material derived from Aspergillus niger mycelium, AnimatRT. This material is produced from residual biomass generated in industrial citric acid production, offering a circular-economy approach. The raw mycelial biomass, consisting of spherical pellets, is processed via mold casting and air-drying, consolidating the pellets into a dense, plastic-like monolith (1.23 g cm⁻³).
When formed into sheets, AnimatRT serves as a viable substrate for low-complexity PCB fabrication, allowing for direct ink writing and manual soldering of electronic components. Although its electrical properties are lower than those of FR-2 (flame retardant 2), a common, low-cost PCB laminate made of paper bonded with a phenolic resin, it remains suitable for low-frequency and proof-of-concept applications and, on average, has 56% lower embodied carbon. The mycelium boards disintegrate in water, allowing recovery of operative electronic components, whose functionality was demonstrated by re-soldering them onto a conventional PCB. The material exhibits high mechanical performance, with compressive strengths of up to 121 MPa, a flexural modulus of 2.3 GPa, and a flexural strength of 30 MPa. It is fully biodegradable (ISO 20200), redispersible in water, has low flammability, and favorable thermal insulation properties (0.21 W (mK)‑1). Heat treatment at 120°C enhances the mechanical properties, improves water resistance, and slows biodegradation. This study demonstrates the first use of biotechnology–derived A. niger mycelium as a biodegradable substrate for PCBs, addressing circularity and end-of-life challenges in electronics.