Over the decades, the thermal analysis community has been effectively using the Johnson-Mehl-Avrami (JMA) equation to model the crystallization kinetics of the processes occurring in solid state. In a relatively recent approach, it has been pointed out that the two-parameter autocatalytic Sestak-...
On Johnson-Mehl-Avrami equation A comment on Sarkar and Ray's criticism about the application of JMA equation to the analysis of kinetic dataNote Published: November 1991 Volume 37, pages 2729–2730, (1991) Cite this article Journal of thermal analysis Aims and scope Submit manuscript R. V....
A test of the Johnson-Mehl-Avrami equationA test of the Johnson-Mehl-Avrami equationMonte Carlosimulationadsorptionpotential barriersThe Johnson-Mehl-Avrami (JMA) equation is evaluated for a phase transformation process in two dimensions via computer modelling. The JMA equation appears to be highly ac...
JMA equation, the value of M P α should be a constant of 0.632 [14], here M P α represents the transformed volume fraction where z(α) reaches a peak value. 3.2. Modified method for extracting the kinetic parameters When the JMA model was not suitable for kinetic analy- ...
The equation proposed by Augis and Bennett for determining the kinetic exponent of the Johnson-Mehl-Avrami (JMA) model is thoroughly analyzed; a new expres... FJ Gotor,JM Criado,J Malek - 《Journal of the American Ceramic Society》 被引量: 0发表: 2001年 Limitation of the Johnson-Mehl-Avra...
Equation 3 was solved by Sekimoto for I t =const, while Ben-Naim et al. derived a formal solution for arbitrary I t 21 . Below, we show that the solution of Ben-Naim et al. can also be obtained directly by applying Kolmogorov’s argument. In Fig. 3, we see a hole of size x ...
which indicates that the isothermal crystallization kinetics can be modeled by JMA equation.However,the values of xm at different heating rates(10,20,30 and 40 K/min)are about 0.52,implying that JMA model is not valid to the isochronal crystallization kinetics.The reason why the JMA model is ...
The value of xm has a constant of 0.632 for JMA model. It is found that the values of xm at different isothermal annealing temperatures (743, 748, 753 and 758 K) are almost near 0.632, which indicates that the isothermal crystallization kinetics can be modeled by JMA equation. However, ...
A.A. Joraid, Limitation of the Johnson-Mehl-Avrami (JMA) formula for kinetic analysis of the crystallization of a chalco- genide glass, Thermochim. Acta, 436(2005), No.1-2, p.78.Joraid AA (2005) Limitation of the Johnson-Mehl-Avrami (JMA) formula for kinetic analysis of the ...