| Abstract Scope |
In situ measurements and atomistic simulations indicate that interfacial kinetic processes like grain growth, sintering, and creep tend to be intermittent, while classical kinetic models tend to be solved based on steady-state assumptions. Classical steady-state models predict reasonable trends in agreement with experimental data, but also fail in many regards. Although steady-state models are ubiquitous, it has not been definitively determined if such models are adequate or suitable. Bicrystal experiments suggest that certain geometrically necessary kinetic processes exhibit large activation barriers that cannot be rationalized within a steady-state framework. This talk will discuss the issues associated with traditional steady-state models and how non-steady-state models can resolve poorly understood kinetic phenomena. |