Crystallization kinetics of Ti 50Ni 25Cu 25 melt-spun amorphous ribbons
Journal
Materials Transactions
Journal Volume
47
Journal Issue
10
Pages
2489-2492
Date Issued
2006
Author(s)
Abstract
The Avrami exponent n of Ti50Ni25Cu25 amorphous ribbons during isothermal annealing derived from the Johnson-Mehl-Avrami equation is about 3.0 and shows good agreement with that obtained by Schloßmacher et al. This indicates that the main crystallization mechanism of Ti50Ni25Cu25 ribbons is interface-controlled three-dimensional isotropic growth with early nucleation-site saturation. According to the Arrhenius relation, the activation energy for crystallization is 314 kJ/mol. This value is similar to that obtained using the Kissinger method, which implies that the crystallization during continuous heating or isothermal annealing follows a similar crystallization mechanism.
SDGs
Type
journal article