Calorimetric data of primary crystallization is usually interpreted in the framework of the
Kolmogorov Dokl. Akad. Nauk SSSR 1, 355 1937 , Johnson and Mehl Trans. AIME 135, 416
1939 , and Avrami J. Chem. Phys. 7, 1103 1939 ; 8, 212 1940 ; 9, 177 1941 KJMA theory.
However, while the KJMA theory assumes random nucleation and exhaustion of space by direct
impingement, primary crystallization is usually driven by diffusion-controlled growth with soft
impingement between the growing crystallites. This results in a stop of the growth before the space
is fully crystallized and induces nonrandom nucleation. In this work, phase-field simulations are
used to check the validity of different kinetic models for describing primary crystallization kinetics.
The results show that KJMA theory provides a good approximation to the soft-impingement and
nonrandom nucleation effects. Moreover, these effects are not responsible of the slowing down of
the kinetics found experimentally in the primary crystallization of glasses.
CitationBruna, P.; Crespo, D.; Gonzalez-Cinca, R.; Pineda, E. (2006). On the validity of Avrami formalism in primary crystallization. Journal of Applied Physics, 100 (5): 54907-54915. ISSN:0021-8979
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder. If you wish to make any use of the work not provided for in the law, please contact: firstname.lastname@example.org