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Research and Projects

The research on nanocrystalline materials focuses on:

  • Synthesis of Bulk Nanocrystalline Metals and Alloys by techniques achieving large strains by plastic deformation under enhanced hydrostatic pressure ("Severe Plastic Deformation, SPD")
  • Characterization of nanostructures from SPD and other processing routes (ball milling, electrodeposition, crystallization from amorphous state) by X-Ray Bragg Profile Analysis (XPA) incl. Synchrotron Radiation
  • Measurement & understanding of mechanical properties (strength, ductility, fatigue strength, fracture thoughness) as a function of grain size and annealing treatment
  • Measurement and understanding of functional properties:
    • Hydrogenated nanomaterials: processing by SPD; hydrogen storage, ab- and desorption, stabilization of lattice defects by hydrogen
    • Thermoelectric nanomaterials: chemical synthesis, processing by ball-milling and SPD, structural analysis and characterization, thermoelectric properties
    • Magnetic nanomaterials: processing by ball-milling and SPD, structural characterization, soft and hard magnetic properties
  • Microstructural features and mechanisms of plastic deformation in polymers with semi/nanocrystalline and amorphous structure
  • Microstructural features and mechanisms of plastic deformation of materials with molecular crystal lattice (e.g. fullerenes)
  • Modelling of mechanical properties of nanoscaled structures

As particular tools, the following measuring techniques have been applied and developed to a high experimental standard:

  • X-Ray Bragg Profile Analysis (XPA, including use of Synchrotron radiation in order to achieve a high resolution in both time and space, and in-situ investigations), for identification of density, type and arrangement of dislocations, internal stresses, crystallite sizes smaller than 500 nm, and vacancy type lattice defects
  • Texture and Stress Analysis by X-Ray Diffraction with spatial resolution  > 50 µm
  • Vacancy Type Defect Analysis: Residual Electrical Resistivity, Calorimetry by  DSC/DTA, Mechanical Spectroscopy by DMA & Rheometry, Positron Annihilation Spectroscopy
  • Mechanical Testing of small samples; strain determination by Video and Laser Speckle Extensometry

Currently Funded Projects:

  • FFG Project 2197099 "Serien ECAP": Technologietransfer und Optimierung des Equal Channel Angular Pressing (ECAP) Verfahrens für Serienproduktion

  • FFG Project 838668 "H2-DeSorb": H2 Speicher aus Mikro- und Nanostrukturiertem Magnesium für optimale De- und Absorption

  • EU Project FP7 ITN-264635 "BioTiNet" : Marie Curie Initial Training Network: Beta biomedical Ti-alloys. (Project Homepage: http://www.biotinet.eu)

Research Group Physics of Nanostructured Materials
Faculty of Physics

University of Vienna
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