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Thermal stability of (Ce0.72Cu0.28)90-xAl10Fex (x = 0, 5 or 10) bulk metallic glasses

Authors
  • Qiao, J.C.
  • Pelletier, J.M.
Publication Date
Jan 01, 2011
Source
HAL-INRIA
Keywords
Language
English
License
Unknown
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Abstract

Thermal stability of (Ce0.72Cu0.28)90-xAl10Fex (x= 0, 5 or 10) bulk metallic glasses (BMGs) was analyzed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Temperatures corresponding to glass transition (Tg), onset of crystallization (Tx) and crystallization peak (Tp) shift to higher temperature by increasing the Fe content. Kissinger model allows calculating the effective activation energy Ea of the crystallization process. For the first crystalline peak, energies are 1.47 eV, 1.50 eV and 1.58 eV for x = 0, 5 and 10, respectively, implying that effective activation energy Eaof the crystallization process increases by increasing the Fe content. In the iron-free alloy, a second crystalline peak is observed, with activation energy of 2.3 eV. Influence of microstructure modifications on elastic and viscoelastic properties was investigated by dynamic mechanical analysis (DMA). © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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