A study of phase separation processes in presence of dislocations in binary systems subjected to irradiation

TL;DR

This paper investigates how dislocations influence phase separation in irradiated binary systems, revealing that dislocations delay ordering and that noise correlations affect interface properties, combining analytical and numerical methods.

Contribution

It introduces a combined analytical and numerical study of dislocation effects on phase separation under irradiation, highlighting the role of stochastic flux correlations.

Findings

Dislocation mechanisms delay phase ordering.

Spatially correlated noise causes dislocation segregation near interfaces.

Noise correlations decrease interface width.

Abstract

Dislocation-assisted phase separation processes in binary systems subjected to irradiation effect are studied analytically and numerically. Irradiation is described by athermal atomic mixing in the form of ballistic flux with spatially correlated stochastic contribution. While studying the dynamics of domain size growth we have shown that the dislocation mechanism of phase decomposition delays the ordering processes. It is found that spatial correlations of the ballistic flux noise cause segregation of dislocation cores in the vicinity of interfaces effectively decreasing the interface width. A competition between regular and stochastic components of the ballistic flux is discussed.