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On calorimetric study of the fragility in bulk metallic glasses with low glass transition temperature: (Ce0.72Cu0.28) 90-x Al10Fex (x = 0, 5 or 10) and Zn 38Mg12Ca32Yb18

Authors
  • Qiao, J.C.
  • Pelletier, Jean-Marc
  • Wang, Q.
  • Jiao, W.
  • Wang, W.H.
Publication Date
Jan 01, 2011
Source
HAL
Keywords
Language
English
License
Unknown
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Abstract

Compared with conventional bulk metallic glasses, Ce-based and Zn-based bulk metallic glasses have received considerable attention because of their possible application as structural and functional materials. Kinetic fragility parameter m in amorphous material presents degree of deviations from the Arrhenius law above the glass transition temperature (Tg) of the material. Kinetic fragility parameter (m) and Kauzmann temperature (T K) in (Ce0.72Cu0.28)90-x Al 10Fex (x = 0, 5 or 10) and Zn38Mg 12Ca32Yb18 bulk metallic glasses have been determined by differential scanning calorimetry (DSC). Results show that Zn 38Mg12Ca32Yb18 presents a higher m than (Ce0.72Cu0.28)90-x Al10Fe x (x = 0, 5 or 10). The activation energies Eg for glass transition are 1.51 eV (x = 0), 1.59 eV (x = 5) and 1.83 eV (x = 10) in (Ce 0.72Cu0.28)90-x Al10Fex (x = 0, 5 or 10), and 3.59 eV in Zn38Mg12Ca 32Yb18, respectively. The values of Eg increase with increasing the Fe content in (Ce0.72Cu0.28) 90-x Al10Fex (x = 0, 5 or 10) bulk metallic glasses. Kinetic fragility parameter m of bulk metallic glasses increases with the glass transition temperature Tg of bulk metallic glasses, in agreement with previous investigations. © 2011 Elsevier Ltd. All rights reserved.

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