Avrami exponent under transient and heterogeneous nucleation transformation conditions

Autor:	Sinha, I., Mandal, R. K.
Rok vydání:	2010
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1016/j.jnoncrysol.2010.11.005
Popis:	The Kolmogorov-Johnson-Mehl-Avrami model for isothermal transformation kinetics is universal under specific assumptions. However, the experimental Avrami exponent deviates from the universal value. In this context, we study the effect of transient heterogeneous nucleation on the Avrami exponent for bulk materials and also for transformations leading to nanostructured materials. All transformations are assumed to be polymorphic. A discrete version of the KJMA model is modified for this purpose. Scaling relations for transformations under different conditions are reported. Comment: 19 pages, 6 figures Accepted for publication in Journal of Non-Crystalline Solids
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1010.0049 Zobrazit plný text záznamu View this record from Arxiv