On the origin of non-Arrhenius behavior of grain growth
Abstract
Non-Arrhenius grain growth has been observed in a range of polycrystalline materials; however, its fundamental mechanisms, particularly whether the process is thermally activated or exhibits anti-thermally activation, remain controversial. In this study, SrTiO3 was employed as a model system to systematically investigate non-Arrhenius grain growth behavior through combined experimental and theoretical approaches, utilizing a newly developed grain growth model. The results reveal that non-Arrhenius grain growth is a thermally activated process without a definitive characteristic temperature, which is primarily controlled by the interplay between temperature-dependent factors and the temperature-independent parameters such as grain size and its distribution. Moreover, during abnormal grain growth (AGG), the non-Arrhenius behavior of grain growth primarily occurs at lower temperatures and gradually transitions to Arrhenius-type behavior as the temperature increases.
Cite
@article{arxiv.2603.18552,
title = {On the origin of non-Arrhenius behavior of grain growth},
author = {Xinlei Pan and Jingyu Li and Jianfeng Hu},
journal= {arXiv preprint arXiv:2603.18552},
year = {2026}
}