Abstract
A model is proposed accounting for grain boundary (GB) wetting in polycrystals. Liquid penetration into GB planes, triple lines, and quadruple points is analyzed. The GB wetting condition (Gibbs-Smith criterion) is generalized by introducing a parameter defined as “characteristic free energy.” In order to find critical values of interfacial/GB energy ratio corresponding to an infinite cluster formation, the percolation theory has been used. Model estimates are consistent with the experimentally observed topology of additives in polycrystalline zinc.
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