Abstract
In the present study triple junction controlled grain growth in thin films is compared to the case of normal (grain boundary controlled) grain growth. To that aim, a modified three-dimensional Potts model algorithm is employed and the results are compared using previously developed mean-field theories, for which the increased importance of the triple junctions at small grain sizes is taken into account modeling grain growth in nanocrystalline materials. In particular, the influence of the transition from bulk-like growth to columnar microstructures on the two different kinetics is analyzed in detail for the first time.
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