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.
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