Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 10: Poster Session 1
MM 10.7: Poster
Montag, 5. September 2022, 18:00–20:00, P2
Influence of swift heavy ion irradiation on Pd-based metallic glasses — •Saba Khademorezaian1, Maximillian Demming1, Marilena Tomut1,2, Sergiy Divinski1, and Gerhard Wilde1 — 1Institute of Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster — 2GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Bulk and ribbon samples of Pd40Ni40P20 in as-quenched and relaxed states were room-temperature irradiated with 4.8 MeV/u 179Au ions at the UNILAC accelerator. Ion beam-induced surface patterning associated with irradiation masks and smoothening of the surface were studied by laser scanning microscope and profilometry. Irradiation induces an out-of-plane swelling step of approximately 100 nm as measured at the boundary between the irradiated and non-irradiated areas and can be explained by additional free volume creation in the solidified ion tracks. The swelling and plastic flow mechanisms are analyzed. Changes in the relaxation enthalpy have been investigated using differential scanning calorimetry. Low-temperature heat capacity measurements substantiate prominent irradiation-induced changes of the Boson peak. Furthermore, changes in diffusivity with increasing fluence was found by post-irradiation tracer diffusion measurements. The evolution of mechanical properties was probed by nanoindentation measurements and the changes induced by irradiation are compared with those caused by mechanical rejuvenation.