Kinetics of phase transformations with heterogeneous correlated-nucleation

Massimo Tomellini and Sara Politi

Physica A: Statistical Mechanics and its Applications, 2019, vol. 513, issue C, 175-188

Abstract: We develop a stochastic approach for describing the kinetics of 3D-phase transformations ruled by time-dependent correlated nucleation at solid surfaces. The kinetics is expressed as a series of correlation functions and, at odds with modeling based on Poisson statistics, it is formulated in terms of actual nucleation rate. It is shown that truncation of the series up to second order terms in correlation functions provides a very good approximation of the kinetics. The time evolution of both total amount of growing phase and surface coverage by the new phase have been determined. The theory is applied to describe progressive nucleation with parabolic growth under time dependent hard-disk correlation. This approach is suitable for describing electrochemical deposition by nucleation and growth where correlation effects are significant. In this ambit the effect of correlated nucleation on the behavior of kinetic quantities used to study electrodeposition has also been investigated.

Keywords: Phase transformation kinetics; Non-random nucleation; Heterogeneous nucleation; KJMA theory; Electrodeposition (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:513:y:2019:i:c:p:175-188

DOI: 10.1016/j.physa.2018.08.165

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