Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass
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in: Scientific reports (London : Nature Publishing Group), Jahrgang 7.2017, 44903, 21.03.2017.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass
AU - Gammer, Christoph
AU - Escher, Benjamin
AU - Ebner, Clemens
AU - Minor, A. M.
AU - Karnthaler, Hans-Peter
AU - Eckert, Jürgen
AU - Pauly, Simon
AU - Rentenberger, C.
PY - 2017/3/21
Y1 - 2017/3/21
N2 - 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.
AB - 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.
U2 - 10.1038/srep44903
DO - 10.1038/srep44903
M3 - Article
VL - 7.2017
JO - Scientific reports (London : Nature Publishing Group)
JF - Scientific reports (London : Nature Publishing Group)
SN - 2045-2322
M1 - 44903
ER -
