Effect of a finite boundary junction mobility on the growth rate of grains in two-dimensional polycrystals

The effect of a finite triple junction mobility on the growth rate of two-dimensional polycrystals is studied by means of computer simulations. The equations that describe this effect are derived on the basis of the von Neumann–Mullins equation. The derived equations are compared to network-model computer simulations and show a good agreement. An analysis of the grain growth kinetics points out that the effect of the initial topology prior to the onset of grain growth is stronger than previously thought. This indicates as well that grain growth controlled by triple junctions cannot be estimated only from the kinetics.