Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 48: Topical session: X-ray and neutron scattering in materials science I - Coherent X-ray Diffraction Imaging of Excitations in Metal Nanoparticles
MM 48.1: Vortrag
Donnerstag, 3. April 2014, 10:15–10:30, BAR 205
Structural study of CuZr and Cu50Zr45Al5 metallic glasses in relation to their GFA and mechanical properties — •Ivan Kaban1,2, Pal Jovari3, Benjamin Escher1,2, Adam Webb4, Tom Regier4, Brigitte Beuneu5, Valentin Kokotin6, Norbert Mattern2, and Jürgen Eckert1,2 — 1TU Dresden, Institute of Materials Science, Germany — 2IFW Dresden, Institute for Complex Materials, Germany — 3Institute for Solid State Physics and Optics, Budapest, Hungary — 4Canadian Light Source, Saskatoon, Canada — 5Laboratoire Leon Brillouin, CEA-Saclay, France — 6ThyssenKrupp Steel Europe AG, Duisburg, Germany
In this work we investigate the atomic structure of CuZr and Cu50Zr45Al5 metallic glasses in view of their glass-forming ability and mechanical properties. Using a combination of the state-of-the-art experimental techniques (synchrotron X-ray diffraction and absorption spectroscopy and neutron diffraction), reverse Monte-Carlo simulation and Molecular Dynamics modelling we have obtained partial pair distribution functions, coordination numbers and bond lengths for the glasses studied. Remarkable differences are found for the total as well as for the partial pair distributions in the CuZr and Cu50Zr45Al5 metallic glasses, especially for the Cu-Cu and Zr-Zr pairs at the second and higher coordination shells, suggesting important role of the medium-range order in the glass formation and in the mechanical behaviour.