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Title: Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass

Fluctuation electron microscopy of bulk metallic glasses of CuZrAl(Ag) demonstrates that medium-range order is sensitive to minor compositional changes. Furthermore, 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 thus 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.
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5] ;  [2] ;  [3]
  1. Austrian Academy of Sciences, Leoben (Austria). Eich Schmid Inst. of Materials Science
  2. Leibniz Inst. for Solid State and Materials Research (IFW Dresden) (Germany). Inst. for Complex Materials
  3. Univ. of Vienna (Austria)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Center for Electron Microscopy; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineeing
  5. Austrian Academy of Sciences, Leoben (Austria). Eich Schmid Inst. of Materials Science; Montanuniversität Leoben (Austria). Dept. of Materials Physics
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
36 MATERIALS SCIENCE; glasses; transmission electron microscopy
OSTI Identifier: