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Titel
Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass
Autor*in
C. Gammer
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria
Autor*in
B. Escher
IFW Dresden, Institute for Complex Materials, Helmholtzstraße 20, 01069 Dresden, Germany
... show all
Abstract
Fluctuation electron microscopy of bulk metallic glasses of CuZrAl(Ag) demonstrates that medium-range order is sensitive to minor compositional changes. By analyzing nanodiffraction patterns medium-range order is detected with crystal-like motifs based on the B2 CuZr structure and its distorted structures resembling the martensitic ones. This result demonstrates some structural homology between the metallic glass and its high temperature crystalline phase. The amount of medium-range order seems slightly affected with increasing Ag concentration (0, 2, 5 at.%) but the structural motifs of the medium-range ordered clusters become more diverse at the highest Ag concentration. The decrease of dominant clusters is consistent with the destabilization of the B2 structure measured by calorimetry and accounts for the increased glass-forming ability.
Objekt-Typ
Sprache
Englisch [eng]
Erscheinungsdatum
2017
Seitenanfang
44903
Erschienen in
Titel
Scientific Reports
Band
7
Verlag
Springer Nature
Projektnummer
I 1309 – Austrian Science Fund (FWF)
Persistent identifier
https://phaidra.univie.ac.at/o:705764
Zugänglichkeit
Rechteangabe
© The Author(s) 2017

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