Classical nucleation theory in ordering alloys precipitating with L12 structure
Materials Science
2007-05-23 v1
Abstract
By means of low-temperature expansions (LTEs), the nucleation free energy and the precipitate interface free energy are expressed as functions of the solubility limit for alloys which lead to the precipitation of a stoichiometric L12 compound such as Al-Sc or Al-Zr alloys. Classical nucleation theory is then used to obtain a simple expression of the nucleation rate whose validity is demonstrated by a comparison with atomic simulations. LTEs also explain why simple mean-field approximation like the Bragg-Williams approximation fails to predict correct nucleation rates in such an ordering alloy.
Keywords
Cite
@article{arxiv.0704.1988,
title = {Classical nucleation theory in ordering alloys precipitating with L12 structure},
author = {Emmanuel Clouet and Maylise Nastar},
journal= {arXiv preprint arXiv:0704.1988},
year = {2007}
}