Irreversible Eshelby description of aging in glasses

TL;DR

This paper extends the Eshelby model of glass aging by incorporating a distribution of fictive temperatures, improving understanding of heating behavior after cooling.

Contribution

It introduces a distribution of fictive temperatures into the Eshelby framework, enhancing the model's ability to describe glass aging during heating.

Findings

Distribution of fictive temperatures is crucial for accurate heating predictions.

Extension has minimal impact on cooling but is essential for heating analysis.

Model aligns better with experimental observations during reheating.

Abstract

The recent description of the cooling through the glass transition in terms of irreversible structural Eshelby rearrangements with a single average fictive temperature is extended to a distribution of fictive temperatures around the average one. The extension has only little influence on the cooling scans, but turns out to be necessary to understand the heating back to equilibrium.