The effects of vanadium in the crystallization kinetics amorphous ribbons
Fe80-yVyB12Si8 (0.5 <
y < 15) has been investigated by Differential
Scanning Calorimetry, by using the Avrami, Kolmogorov-Johnson-Mehl-Avrami,
and Calka and Radlinski equations. The addition of vanadium to Fe-B-Si
alloys leads to an enhancement of stability against crystallization, as
shown by an increase in the effective activation energy for crystallization
eff = 3.6eV) and an increase in the temperature for the first
crystallization peak, as a function of vanadium content (from 780 to 855K).
Results also show that the crystallization Mechanism, nucleation rate and
dimensionality of growth are constant throughout the crystallization process
in the composition range investigated.