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.
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Recent Submissions
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.
Dataset for the publication - A labelled property graph Framework for managing vitrimer formulation-, manufacturing-, and material-data: a proof-of-concept study on glass transition temperature
(Technische Universität Dresden, 2026-06-16) Saske, Bernhard; Sambale, Anna; Dammann, Maximilian; Von den Berg, Nina; Schwoch, Sebastian
The data set is used in the article A labelled property graph Framework for managing vitrimer formulation-, manufacturing-, and material-data: a proof-of-concept study on glass transition temperature. The study investigates the use of a labelled property graph for storing measurement series related to determining the material properties of vitrimers, focusing on glass transition temperature (Tg). Two epoxy/4AFD vitrimer formulations with different resin-to-hardener ratios were analyzed, yielding Tg values of approximately 135.1 ± 0.2 °C and 107.6 ± 0.4 °C, respectively, from differential scanning calorimetry measurements. A custom data model was developed using a labelled property graph approach, designed in Hackolade Studio and implemented in Neo4j, to link experimental data with metadata. The proof of concept demonstrated the model's usability and consistency, highlighting the potential of property graph databases for structured vitrimer data storage.
GRK2802: Effect of Sulfur on the Surface Tension of Low-Sulfur Manganese-Boron Steel
(Technische Universität Bergakademie Freiberg, 2026-06-16) Bellé, Matheus Roberto; Volkova, Olena
Abstract In the present study, the surface tension of sulfur-containing manganeseboron steels is measured at high temperatures via the Maximum Bubble Pressure (MBP) method. Density, essential for determining surface tension, was measured in parallel and found to decrease slightly with rising temperatures, from 6952 ± 13 to 6830 ± 85 kg m−3 between 1550 and 1650 °C, as seen in the alloy containing 130 ppm S. Surface tension in this alloy increased from 1234 ± 4 to 1301 ± 9 mN m−1 as the temperature increased from 1550 to 1650 °C, with a consistent positive temperature coefficient. Even small additions of sulfur significantly reduced surface tension at all temperatures. For instance, at 1600 °C, the surface tension decreased from 1389 to 1264 mN m−1 with the increase of sulfur from 39 to 130 ppm. The relationship between surface tension and sulfur content followed an inverse logarithmic relationship and the temperature increase decreased the coefficient of change of the surface tension. This work generated reliable results, contributing to the understanding of surface tension and providing data for the processing of this steel grade.