Second-phase nucleation on an edge dislocation
Abstract
A model for nucleation of second phase at or around dislocation in a crystalline solid is considered. The model employs the Ginzburg-Landau theory of phase transition comprising the sextic term in order parameter in the Landau free energy. The ground state solution of the linearized time-independent Ginzburg-Landau equation has been derived, through which the spatial variation of the order parameter has been delineated. Moreover, a generic phase diagram indicating a tricritical behavior near and away from the dislocation is depicted. The relation between the classical nucleation theory and the Ginzburg-Landau approach has been discussed, for which the critical formation energy of nucleus is related to the maximal of the Landau potential energy. A numerical example illustrating the application of the model to the case of nucleation of hydrides in zirconium alloys is provided.
Cite
@article{arxiv.1108.3935,
title = {Second-phase nucleation on an edge dislocation},
author = {Ali R. Massih},
journal= {arXiv preprint arXiv:1108.3935},
year = {2016}
}
Comments
23 pages, 6 figures, to appear in Philosophical Magazine