Berlin 2024 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 55: Liquid and Amorphous Materials II
MM 55.3: Vortrag
Donnerstag, 21. März 2024, 10:45–11:00, C 230
Correlations between the p content and medium-range order of bulk pd-ni-p metallic glasses — •Hongshuai Li1, Martin Peterlechner2, and Gerhard Wilde1 — 1Institute of Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2Laboratory for Electron Microscopy, Karlsruhe Institute for Technology (KIT), Engesserstr. 7, 76131 Karlsruhe, Germany
So far, the understanding of a composition dependence of medium-range order (MRO) in metallic glasses is incomplete. Thus, structure-property correlations for glasses or the structural origin of often helpful *minor alloying* strategies remain unknown. In this study, we systematically investigated three as-cast ductile bulk Pd-Ni-P metallic glass samples, where the P content was deliberately varied from 17 to 21 at%. The medium-range order of these samples was characterized using variable-resolution fluctuation electron microscopy. Sampling with different parallel coherent probe sizes, so-called variable resolution FEM (VR-FEM), was performed. From the obtained normalized variance values of the experimental data the dominant MRO correlation lengths are determined. The results are discussed with respect to the compositional dependence of MRO in a given alloy system, i.e. without changes incurred by introducing additional chemical complexity.
Keywords: Metallic Glass; STEM; FEM; MRO; compositional dependence