Paper Title:
Multiscale Modelling of the Ageing Kinetics of a 2D Deposit
  Abstract

We compare three models of 2D precipitation kinetics that give access to different time-space scales. Kinetic Monte Carlo simulations (KMC), cluster dynamics (CD) and nucleation-growth-coalescence model (NGCM), based on a same atomic model, lead to an excellent agreement as long as the interfacial free energy is evaluated accurately and the interaction between diffusion fields is taken into account in the CD. The NGCM model noticeably improves the previous approaches of the same kind by using a constrained-equilibrium hypothesis to describe the solid solution. Moreover, in the coalescence regime, we show that CD leads to cluster distributions that are wider and more symmetric than the LSW distribution due to the probabilistic feature of the growth law of a cluster, that makes it differ from the purely deterministic NGCM approach.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
664-669
DOI
10.4028/www.scientific.net/SSP.172-174.664
Citation
F. Berthier, E. Maras, I. Braems, B. Legrand, "Multiscale Modelling of the Ageing Kinetics of a 2D Deposit", Solid State Phenomena, Vols. 172-174, pp. 664-669, 2011
Online since
June 2011
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$32.00
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