TY - JOUR
T1 - Aging and structural relaxation of hyper-quenched Mg65Cu25Y10 metallic glass
AU - Zhai, Fuqiang
AU - Pineda, Eloi
AU - Ruta, Beatrice
AU - Gonzalez-Silveira, Marta
AU - Crespo, Daniel
PY - 2015/1/15
Y1 - 2015/1/15
N2 - © 2014 Elsevier B.V. All rights reserved. The structural relaxation, glass transition and crystallization processes of Mg65Cu25Y10 metallic glass are studied by Differential Scanning Calorimetry (DSC) and Mechanical spectroscopy. The relaxation model derived from the mechanical measurements is compared with the kinetics of these transformations obtained from the DSC curves. The structural relaxation kinetics is found to be controlled by the glassy dynamics following an Adams-Gibbs-Vogel function. The glass transition and crystallization kinetics are controlled by the dynamics of the supercooled melt following a Vogel-Fulcher-Tammann behaviour. The results suggest that the microscopic processes responsible of structural relaxation and aging below the glass transition correspond to the same processes generating the α-relaxation peak.
AB - © 2014 Elsevier B.V. All rights reserved. The structural relaxation, glass transition and crystallization processes of Mg65Cu25Y10 metallic glass are studied by Differential Scanning Calorimetry (DSC) and Mechanical spectroscopy. The relaxation model derived from the mechanical measurements is compared with the kinetics of these transformations obtained from the DSC curves. The structural relaxation kinetics is found to be controlled by the glassy dynamics following an Adams-Gibbs-Vogel function. The glass transition and crystallization kinetics are controlled by the dynamics of the supercooled melt following a Vogel-Fulcher-Tammann behaviour. The results suggest that the microscopic processes responsible of structural relaxation and aging below the glass transition correspond to the same processes generating the α-relaxation peak.
KW - Alpha relaxation
KW - DSC
KW - Mechanical spectroscopy
KW - Metallic glasses
KW - Relaxation kinetics
U2 - 10.1016/j.jallcom.2013.11.120
DO - 10.1016/j.jallcom.2013.11.120
M3 - Article
SN - 0925-8388
VL - 615
SP - S9-S12
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - S1
ER -