What Role do Grain Boundaries Play in Nanomaterials?
Grain boundaries can significantly influence the mechanical properties of nanomaterials. They can impede the movement of dislocations, leading to increased strength—a phenomenon known as the Hall-Petch effect. However, at the nanoscale, the high density of grain boundaries can also lead to grain boundary sliding, which may result in creep or other deformation mechanisms. Additionally, grain boundaries can affect the diffusion of atoms, impacting processes such as sintering and grain growth.
