Dislocation dynamics in ceramics: A perspective from theoretical simulations

Abstract Plasticity in ceramics is governed by the process of dislocation dynamics, which can be divided into four stages: nucleation, activation, motion, and multiplication of dislocations. Unlike metals, ceramics exhibit distinct dynamic behavior of dislocations due to their inherent properties, such as a weak ability to nucleate and difficulties in activation. These factors contribute to their brittle nature and pose challenges for studying their plasticity. Theoretical simulations are useful tools to study dislocation dynamic behaviors. In this perspective, we briefly summarize the current methods for simulating the four stages of dislocation dynamics and discuss their relevance to the characteristic parameters of each stage. Additionally, we review the progress and challenges in applying these methods to ceramic materials. By addressing these aspects, we aim to provide an understanding of how simulations contribute to the study and improvement of ceramic plasticity.