A study on the non-isothermal transformation kinetics of glassy alloys when the nucleation frequency and crystal growth rate depend on time as a power law

Calorimetric study of non-isothermal crystallization kinetics of Zr60Cu20Al10Ni10 bulk metallic glass

“…Therefore, a definitive measurement of the non-isothermal transition kinetics is desirable. Many efforts were given to build up the models to illustrate the non-isothermal crystallization process and thermal stability of various metallic glasses [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The Johnson-Mehl-Avrami (JMA) formalism, which was developed for determining mechanisms that govern nucleation and growth in the isothermal crystallization process, can also be used for the non-isothermal experiments under certain conditions.…”

Kinetic study of non-isothermal crystallization in Fe78Si9B13 metallic glass

“…High values of the reaction order (n > 4) have been reported for Fe-based alloys and ternary chalcogenide glass assuming surface induced abnormal grain growth with fractal dimensionality [35]. Recently, Cárdenas-Leal et al [36] have reported unexpected large value (n > 5) for the crystallization of the second peak in a semiconductor glass. According to their theoretical model developed (TMD) which consider the mutual interference of regions growing from separated nuclei and larger value of the kinetic exponent (n), this unexpected value is explained assuming that both the nucleation frequency and crystal growth rate depend on time as a power law.…”