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

J.C. Qiao (1) , Jean-Marc Pelletier (1)

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

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.

Mots clés: Dynamic mechanical; Effective activation energy; Elastic and viscoelastic properties; Fe content; Higher temperatures; Kissinger model; Microstructure modifications; Activation energy; Crystalline materials; Crystallization; Differential scanning calorimetry; Diffraction; Dynamic analysis; Dynamic mechanical analysis; Dynamics; Glass; Glass transition; Iron alloys; Mechanical properties; Polyethylenes; Thermodynamic stability; X ray diffraction; Metallic glass; Bulk metallic glass; Crystalline peaks; Crystallization process

Domaines: Matériaux

J.C. Qiao, Jean-Marc Pelletier. Thermal stability of (Ce0.72Cu0.28)90-xAl10Fex (x = 0, 5 or 10) bulk metallic glasses. physica status solidi (c), 2011, 8 (11-12), pp.3074-3077. ⟨10.1002/pssc.201000713⟩. ⟨hal-01813676⟩