SKM 2023 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 28: Liquid and Amorphous Metals
MM 28.7: Vortrag
Mittwoch, 29. März 2023, 12:00–12:15, SCH A 118
Nanostructural investigations on thin film nanoglasses using different TEM techniques — •Hendrik Voigt1, Evgeniy Boltynjuk2, Aaron Rigoni1, Horst Hahn2, Harald Rösner1, and Gerhard Wilde1 — 1University of Münster, Institute of Materials Physics, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2Karlsruhe Institute of Technology, Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Nanoglasses as a relatively new family of amorphous alloys present an attempt to tailor the structure of glasses to improve their properties. The concept of nanoglasses is based on the introduction of glass-glass interfaces into the amorphous material, mimicking the effect that defects have in crystalline matter. Different transmission electron microscopy (TEM) techniques were used to investigate the microstructure of Cu60Zr40 columnar thin film nanoglasses. Nanobeam diffraction pattern (NBDP) analysis and energy dispersive X-ray spectroscopy (EDX) were employed to investigate differences in the excess free volume and chemical composition. NBDP acquired over an extended region of interest were used to perform an angular correlation analysis revealing different symmetry motives compared to a compositionally equivalent homogenous glass. Additionally, time-of-flight secondary ion mass spectroscopy (ToF SIMS) measurements discovered an increase in diffusivity in the nanoglasses. All the results shown here provide clear evidence for the existence of glass-glass interfaces with two structurally different phases present in the nanoglass.