Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 30: Liquid and Amorphous Metals
MM 30.2: Vortrag
Donnerstag, 8. September 2022, 10:30–10:45, H46
Revealing the impact of Sulfur addition on the medium-range order and relaxation dynamics of metallic glasses — •Hendrik Voigt1, Nico Neuber2, Harald Rösner1, Martin Peterlechner1, Ralf Busch2, and Gerhard Wilde1 — 1Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany — 2Chair of Metallic Materials, Saarland University, Saarbrücken, Germany
The addition of Sulfur as an alloying element has been shown to enable or improve the glass forming ability of certain glasses drastically [1]. Despite growing knowledge of the impact that Sulfur has on the mechanical properties, the underlying structure and its dynamics are still not fully understood [2].
In this contribution the sample system Pd31Ni42S27 has been investigated with respect to medium-range order (MRO). For the MRO analysis multiple series of nanobeam diffraction patterns with varying probe sizes were acquired in order to conduct variable resolution Fluctuation Electron Microscopy (FEM). Furthermore, Electron Correlation Microscopy (ECM) was employed to analyse relaxation dynamics by the acquisition of a tilted dark-field time series. By the combination of these two techniques it appears that the size of the regions displaying strongly decelerated dynamics at room temperature correlate with the detected MRO. The results are discussed with respect to current models.
[1] A. Kuball et al., Scripta Materialia (2018) 73-76 [2] H. Jiang et al., Scripta Materialia (2021) 116923