Anomalous effect of lattice misfit on the coarsening behavior of multicomponent L1₂ phase

The multicomponent L1₂ phase in high entropy alloys (HEAs) has shown excellent thermal stability. However, the understanding of its intrinsic origins is limited to the Lifshitz-Slyozov-Wagner (LSW) theory. In the present study, we investigate the influence of lattice misfit, which is not considered in LSW theory, on the coarsening kinetics of the multicomponent L1₂ phase. Different from that in most traditional alloys, the coarsening constant of multicomponent L1₂ particles decreases with the increasing lattice misfit in HEAs. This finding provides a new view for understanding the sluggish coarsening kinetics of L1₂ phase in HEAs.