Abstract
Glass forming ability, crystallization and stability of a rapidly quenched, Al85Y5Ni8Co2 amorphous alloy have been investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Calorimetric results obtained in continuous heating regime reveal a glass transition followed by a wide supercooled liquid region (27°C) and then by a three-stage crystallization process, starting with the primary formation of nanoscale α-Al particles. However, isothermal annealing of the as-quenched samples below the glass-transition temperature activates the first two crystallization stages and an unidentified compound is formed conjointly with a-Al. Kinetic analysis suggests that crystallization occurs through nucleation and three-dimensional growth. © 2004 Published by Elsevier B.V.
Original language | English |
---|---|
Pages (from-to) | 143-149 |
Journal | Journal of Non-Crystalline Solids |
Volume | 343 |
DOIs | |
Publication status | Published - 1 Sep 2004 |