Please use this identifier to cite or link to this item: doi:10.22028/D291-39388
Title: Disentangling structural and kinetic components of the α-relaxation in supercooled metallic liquids
Author(s): Neuber, Nico
Gross, Oliver
Frey, Maximilian
Bochtler, Benedikt
Kuball, Alexander
Hechler, Simon
Yang, Fan
Pineda, Eloi
Westermeier, Fabian
Sprung, Michael
Schäfer, Florian
Gallino, Isabella
Busch, Ralf
Ruta, Beatrice
Language: English
Title: Communications Physics
Volume: 5
Issue: 1
Publisher/Platform: Springer Nature
Year of Publication: 2022
Free key words: Glasses
Metals and alloys
Surfaces, interfaces and thin films
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: The particle motion associated to the α-relaxation in supercooled liquids is still challenging scientists due to its difficulty to be probed experimentally. By combining synchrotron techniques, we report the existence of microscopic structure-dynamics relationships in Pt42.5Cu27Ni9.5P21 and Pd42.5Cu27Ni9.5P21 liquids which allows us to disentangle structural and kinetic contributions to the α-process. While the two alloys show similar kinetic fragilities, their structural fragilities differ and correlate with the temperature dependence of the stretching parameter describing the decay of the density fluctuations. This implies that the evolution of dynamical heterogeneities in supercooled alloys is determined by the rigidity of the melt structure. We find also that the atomic motion not only reflects the topological order but also the chemical short-range order, which can lead to a surprising slowdown of the αprocess at the mesoscopic length scale. These results will contribute to the comprehension of the glass transition, which is still missing.
DOI of the first publication: 10.1038/s42005-022-01099-4
URL of the first publication:
Link to this record: urn:nbn:de:bsz:291--ds-393884
ISSN: 2399-3650
Date of registration: 28-Mar-2023
Description of the related object: Supplementary information
Related object:
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Ralf Busch
NT - Prof. Dr. Christian Motz
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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