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Article Dans Une Revue Philosophical Magazine Letters Année : 2011

Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation

Résumé

Quantitative measurements of the excess free volume in Pd40Cu30Ni10P20 and Cu55Zr30Ti10Pd5 metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.

Domaines

Matériaux
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Dates et versions

hal-00633972 , version 1 (19-10-2011)

Identifiants

  • HAL Id : hal-00633972 , version 1

Citer

K. Hajlaoui, M.A. Yousfi, I. Ouelhazi, K. Georgarakis, Z. Tourki, et al.. Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation. Philosophical Magazine Letters, 2011, 91 (2), pp.122-133. ⟨hal-00633972⟩
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