Isothermal crystallization kinetics of the Ni63Cr18Si13B6alloy

Isothermal crystallization kinetics of the Ni63Cr18B13Si6alloy was carried out by differential scanning calorimetry. The JMA approach was used and the mean Avrami exponent values obtained were found to be consistent with a primary precipitation and a polymorphic crystallization, respectively, for the two crystallization stages. The novel concept of the local value of the Avrami exponent was also applied. The nloc−xplot was seen to be independent of the temperature of isothermal crystallization for the two stages, indicating that the crystallization processes depend only on the volume fraction transformed. Finally, the time-scaling law in the kinetic plots was verified.