Isothermal crystallization kinetics of ball-milled amorphous Al-Ni-Zr alloy
Abstract
The isothermal crystallization kinetics of amorphous Al-Ni-Zr alloy produced by mechanical alloying was studied by means of differential scanning calorimetry. According to Arrhenius equation, the apparent activation energy was calculated. The isothermal crystallization kinetics follows Johnson-Mehl-Avrami equation with n=2.00 within 0.15< x < 0.85, x being the volume fraction crystallized. For understanding the isothermal crystallization process in detail, the concepts of local Avrami exponent and local activation energy have been introduced into this Al-Ni-Zr system.
- Publication:
-
Acta Physica Sinica
- Pub Date:
- February 1995
- DOI:
- 10.1088/1004-423X/4/2/005
- Bibcode:
- 1995AcPSn...4..113W