Thermochimica Acta, Vol.474, No.1-2, 41-46, 2008
Mechanism and kinetics of crystallization of alpha-Fe in amorphous Fe81B13Si4C2 alloy
The non-isothermal crystallization of alpha-Fe from Fe81B13Si4C2 amorphous alloy Was investigated. The kinetic parameters of crystallization process were determined by Kissinger and Kissinger-Akahira-Sunose (KAS) methods. It was established that the kinetic parameters of transformation do not change with the degree of crystallization in the range of 0.1-0.7. The kinetic model of the crystallization process was determined using the Malek's procedure. It was established that the primary crystallization alpha-Fe phase from amorphous alloy can be described by Sestak-Berggren autocatalytic model with kinetic triplet E-a = 349.4.0 kJ mol(-1), In A = 50.76 and f(alpha) = alpha(0.72)(1-alpha)(1.02). (c) 2008 Elsevier B.V. All rights reserved.
Keywords:amorphous alloy;activation energy