Abstract
Quantitative measurements of the excess free volume in Pd 40Cu30Ni10P20 and Cu 55Zr30Ti10Pd5metallic 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.
Original language | English |
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Pages (from-to) | 122-133 |
Number of pages | 12 |
Journal | Philosophical Magazine Letters |
Volume | 91 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2011 Feb 1 |
Keywords
- free volume
- metallic glasses
- structural relaxation
- synchrotron radiation
- X-ray diffraction
ASJC Scopus subject areas
- Condensed Matter Physics