Eliminating overgrowth effects in Poisson spatial process through the correlation among actual nuclei

Details Eliminating overgrowth effects in Poisson spatial process through the correlation among actual nuclei Eliminating overgrowth effects in Poisson spatial process through the correlation among actual nuclei

2003-05-15

arxiv.org/abs/cond-mat/0305338v1

Physics

Condensed Matter

Materials Science

9 pages, 3 figures

Scientific paper

10.1016/j.physa.2003.09.066

It has been shown that the KJMA (Kolmogorov-Johnson-Mehl-Avrami) solution of phase transition kinetics can be set as a problem of correlated nucleation [Phys.Rev.B65, 172301 (2002)]. In this paper the equivalence between the standard solution and the approach that makes use of the actual nucleation rate, i.e. that takes into account spatial correlation among nuclei and/or grains, is shown by a direct calculation in case of linear growth and constant nucleation rate. As a consequence, the intrinsic limit of KJMA theory due to the phenomenon of phantom overgrowth is, at last, overcome. This means that thanks to this new approach it is possible, for instance, to describe phase transition governed by diffusion.

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