Technische Universität Bergakademie Freiberg

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Research data repository of Freiberg University of Mining and Technology.

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  • ItemOpen Access
    Multi-Scale Tomographic Analysis for Micron-Sized Particulate Samples - RAW Data
    (Technische Universität Bergakademie Freiberg, 2019) Ditscherlein, Ralf; Martins de Souza e Silva, Juliana
    This repository includes the reconstructed TIFF-files from multiple scale tomographic analysis of particles in an embedding matrix (overall volume and 3 sub-volumes in 2 different magnification steps): LARGE (low-resolution) (due to filesize partioned in part I, II, III, IV and V) 1 large volume of particle mixture (50/50) of spheres (0.2 - 2 µm) and fibres (diameter: 10 µm length: 100 - 1000 µm) embedded in a matrix (wax, 15 vol-%). The large volume was extracted with an automated syringe into a small polymeric tube (diameter: 1.8 mm) and shock frozen. After that the sample was mounted on top of a needle pin and scanned with a micro-CT (ZEISS Versa510) at 80 keV, 7 W, low energy filter LE4, exposure time 2 s, optical magn. 4x, 3201 projections, 360°, Binning 2, Voxelsize 1.5 µm SubSample - MEDIUM (medium-resolution) (SubSample 1, 2, 3) After the scan, the LARGE volume was cutted in small disks and cutted a second time in little bars. Again, mounted on top of a needle pin and scanned with same parameters, BUT with 40x optical magnification and 25 s exposure time to go down to a system limit of 0.3 µm Voxelsize (again with ZEISS VERSA510). This was done 3 times in different heights of the LARGE volume SubSample - HIGH (high-resolution) (SubSample 1, 2, 3) After that, all SubSamples were scanned again with a nano-CT (ZEISS ULTRA810) at 5.4 keV, 60 s exposure time, 901 projections, 180°, Binning 1 to reach Voxelsize of 0.064 µm
  • ItemOpen Access
    Seismic P-wave velocity model at the DFDP-2 drill site
    (Technische Universität Bergakademie Freiberg, 2019-10-01) Lay, Vera; Bodenburg, Sascha Barbara; Buske, Stefan
    Data sets for a seismic P-wave velocity model from a 3D VSP survey at the Alpine Fault DFDP-2 drill site in the Southern Alps in New Zealand containing the used first-arrival travel times and the obtained P-wave velocity model.
  • ItemOpen Access
    Supporting information to Gagala et al., Tectonics, 38, 2020 (AGU publication) (Tajik-basin structure)
    (Technische Universität Bergakademie Freiberg, 2020-01-19) Ratschbacher, Lothar
    Text S1 provides the references to the Soviet-time geological maps of the USSR at a scale of 1:200,000. Figures provide supporting Figures that are mentioned in the main body of the publication text. Contents of this File: Supporting information S1; Figures S1 to S9
  • ItemOpen Access
    Supporting Information to Dedow et al., AGU, Tectonics, vol. 39, 2020
    (Technische Universität Bergakademie Freiberg, 2020-01-19) Ratschbacher, Lothar
    Supporting information Text S1 gives references to the Soviet-time geological maps referenced in the publication. Tables S1 and S2 provide geochemical data sets and the statistical evaluation
  • ItemOpen Access
    Supporting Information to Abdulhameed et al., "Tajik Basin and Southwestern Tian Shan, Northwestern India-Asia Collision Zone: 2. Timing of Basin Inversion, Tian Shan Mountain Building, and Relation to Pamir-Plateau Advance and Deep India-Asia Indentation", 2020, Tectonics
    (Technische Universität Bergakademie Freiberg, 2020-01-19) Ratschbacher, Lothar
    Supporting information Text S1 Tables S1 to S3 Figure S1 to Figure S4 Dataset S1 with Tables S4 to Table S6
  • ItemOpen Access
    Epoxy-Based Particle Sample Preparation with Nano-Graphite as Spacer - RAW Data (Particle Sample Preparation) - Different mixtures (by volume) of graphite-nanoparticles and analysis particles
    (Technische Universität Bergakademie Freiberg, 2020-05-08) Ditscherlein, Ralf
    To get good image segmentation results in tomographic analysis methods, particles has to be seperated from each other while embedding them into a matrix. Low X-ray absorbing nano-graphite below the voxel resolution of the system is mixed with the analysis particles to form a shell to avoid direct particle-particle contact. After mixing it with epoxy resin, the paste is sucked into a polymeric tube of 2 mm inner diameter. After hardening, the formed cylinder was scanned with an X-ray microscope (ZEISS Xradia Versa 510) with the following parameters: 80 keV, 7 W, 360°, 2001 projections, 1 s exposure time, 2 µm voxel size, binning 2. After scannning, the following filters were applied while reconstruction with ZEISS reconstructor: Beam Hardening Correction 0.05, Smoothing 0,7. Detailed overview of the parameters is summarized as screenshots within the repository. To determine an optimal mixture of the two components, the following volume-fractions were analysed: Nanoparticle:Particle 20vol-%:80vol-% 40vol-%:60vol-% 60vol-%:40vol-%
  • ItemOpen Access
    Microstructural features of AlSi9Cu3 as well as superposition of segmented fatigue crack with initial microstructure studied by µCT
    (Technische Universität Bergakademie Freiberg, 2020-08-20) Wagner, Ruben
    To investigate the impact of melt conditioning and filtration on intermetallic phases in AlSi9Cu3 µCT studies were conducted. The gained research data show microstructural features like pores (#1) and polyhedral intermetallic phases (#2, #2) in 3D videos. The fatigue crack introduced by ultrasonic fatigue testing (USFT) was segmented from µCT slices by machine learning algorithms of Trainable Weka Segmentation and superimposed with the initial microstructure. The superposition of fatigue crack and initial microstructure is shown for a reference batch specimen (#4) and a melt con-ditioned and filtrated batch specimen (#5).
  • ItemOpen Access
    Supplementary material for Härtel, B., Jonkcheere, R., Wauschkuhn, B., Ratschbacher, L.: The closure temperature(s) of zircon Raman dating.
    (Technische Universität Bergakademie Freiberg, 2020-11-24) Härtel, Birk
    Collection of radiation-damage annealing results of laboratory experiments. Determination of closure temperatures for damage accumulation for three Raman bands in zircon.
  • ItemOpen Access
    Tomographic dataset of a particulate Dolomite sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Dolomite particle samples embedded in wax and scanned with tomograph Zeiss Xradia Versa 510 Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Tomographic dataset of a particulate Al2O3 sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Al2O3 particle samples embedded in wax and scanned with tomograph Zeiss Xradia Versa 510 Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Tomographic dataset of a particulate Mica sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Mica particle samples embedded in wax and scanned with tomograph Zeiss Xradia Versa 510 Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Tomographic dataset of a particulate Soda-lime glass sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Soda-lime glass particle samples embedded in epoxy resin mixed with graphite nanoparticles as spacer and scanned with tomograph Zeiss Xradia Versa 510 Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Tomographic dataset of a particulate Quartz sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Quartz particle samples embedded in wax and scanned with tomograph Zeiss Xradia Versa 510 Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Tomographic dataset of a particulate Limstone sample
    (Technische Universität Bergakademie Freiberg, 2021-02-26) Ditscherlein, Ralf
    Limestone particle samples embedded in wax and scanned with tomograph Zeiss Xradia Versa 510. Particle sample is segmented via a standard workflow in Fiji (ImageJ) and provided as "segmented.zip" Resulting discrete particles are stored within the PARROT database (https://parrot.tu-freiberg.de)
  • ItemOpen Access
    Data Archive DFDP Seismic extended 3D surface and VSP survey (Alpine Fault 3D-VSP)
    (Technische Universität Bergakademie Freiberg, 2021-03-29) Buske, Stefan; Benson, Adrian; Lindsay, Danielle; Lawton, Don; Gulley, Anton; Lepine, Patrick; Constantinou, Alexis; Savage, Martha; Bowman, Hamish; Kofman, Randolf; Kellett, Richard; Mann, Christin; Lay, Vera; Schmitt, Douglas; Hopp, Chet; Townend, John; Kleine, Franz; Bertram, Malcolm; Eccles, Jennifer; Gorman, Andrew; McNab, Andrew; Hall, Kevin; Bodenburg, Sascha Barbara
    This seismic data set was acquired in 2016 by a joint effort of several partners. Within this archive, we provide the coordinate lists and correlated data with local coordinates. A detailed field report by Townend et al. (2016) describes the field procedures and available data. Please see the included pdf-file for more details.
  • ItemOpen Access
    Digital Supplement Michael Hohf, Dissertation (Tourmaline chemistry & Geochronology Río Blanco-Los Bronces, Chile)
    (Technische Universität Bergakademie Freiberg, 2021-05-29) Ratschbacher, Lothar
    13 datafiles, Supplement zur Dissertation Michael Hohf (Rohdaten der U-Pb und Ar/Ar Geochronologie; Mineralchemie der Tourmalinanalysen, Bor- und Schwefel-Isotopen-Daten; Karten)
  • ItemOpen Access
    X-ray tomography scans of filter cakes (feed slurry: variation in solid volume fraction)
    (2021-08-20) Löwer, Erik
    X-ray tomography measurements (Zeiss X-radia Versa 510) of in-situ and in a VDI pressure nutsch built filter cakes (Al2O3 crushed particles in 25 mmol/l KI brine with 24 m.-% glycerol). The filter cakes are measured completely saturated. The initial slurry contains Al2O3 particles by variation of the solid content from 10 to 40 vol.-%.
  • ItemOpen Access
    X-ray tomography scan of partially dewatered filter cake
    (2021-08-23) Löwer, Erik
    X-ray tomography image of a partially dewatered filter cake. The initial slurry contains Al2O3 particles suspended in a potassium iodide-glycerol solution, which were separated by cake-forming filtration with subsequent dewatering. All filtration and dewatering experiments took place in an in situ apparatus within the Zeiss Xradia 510 X-ray microscope. The filter cake is dewatered by gradually increasing the pressure. A scan is taken in the equilibrium state after one pressure step. The data set contains seven pore filling grades S1-S7 (= seven pressure steps).
  • ItemOpen Access
    X-ray tomography scans of filter cakes (feed slurry: variation in fraction of fines)
    (2021-08-23) Löwer, Erik
    X-ray tomography scans of partially dewatered filter cakes with variation of fine particles within the feed slurry. The mixture composition varies by addition of fines by 0, 20, 30, 40, 50, 60 and 100 vol.-%. The initial slurry contains Al2O3 particles suspended in a potassium iodide-glycerol solution and separated by cake-forming filtration. All filtration experiments took place in an in-situ apparatus inside the Zeiss Xradia 510 X-ray microscope.
  • ItemOpen Access
    High-resolved X-ray tomography scan of dewatered filter cakes and sessile droplets
    (2021-08-23) Löwer, Erik
    X-ray tomography image of dewatered filter cakes at irreducible saturation. The initial slurry contains Al2O3 particles suspended in a potassium iodide-glycerol solution. These were separated by cake-forming filtration with subsequent dewatering. All filtration and dewatering experiments took place in an in situ apparatus within the Zeiss Xradia 510 X-ray microscope. High resolution scans are acquired in the equilibrium state after dewatering at different locations within the cake structure to measure the local three-phase contact angle. The data are validated by sessile droplet experiments on substrates of the same material within the X-ray microscope.