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Title: In-situ study of crystallization kinetics in ternary bulk metallic glass alloys with different glass forming abilities

In-situ transmission electron microcopy and time-resolved neutron diffraction were used to study crystallization kinetics of two ternary bulk metallic glasses during isothermal annealing in the supercooled liquid region. It is found that the crystallization of Zr{sub 56}Cu{sub 36}Al{sub 8}, an average glass former, follows continuous nucleation and growth, while that of Zr{sub 46}Cu{sub 46}Al{sub 8}, a better glass former, is characterized by site-saturated nucleation, followed by slow growth. Possible mechanisms for the observed differences and the relationship to the glass forming ability are discussed.
Authors:
; ; ;  [1] ; ;  [2] ; ;  [3]
  1. Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Ave., Kowloon (Hong Kong)
  2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing (China)
  3. Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
Publication Date:
OSTI Identifier:
22391999
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALLOYS; ALUMINIUM COMPOUNDS; ANNEALING; COPPER COMPOUNDS; CRYSTALLIZATION; ELECTRONS; METALLIC GLASSES; NEUTRON DIFFRACTION; NUCLEATION; TIME RESOLUTION; ZIRCONIUM COMPOUNDS