The applicability of Johnson-Mehl-Avrami model in the thermal analysis of the crystallization kinetics of glasses

The Johnson-Mehl-Avrami equation is frequently used for analysis of experimental data of nonisothermal crystallization kinetics although this theoretical model has limited applicability for the non-isothermal transformations involving nucleation and growth. It is shown that the applicability of this model should be tested by reliable methods before a quantitative analysis of non-isothermal crystallization data is made. Such testing methods are described and their uses are demonstrated.