Berlin 2008 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 46: Interfaces
MM 46.1: Vortrag
Donnerstag, 28. Februar 2008, 16:30–16:45, H 0111
Effect of the finite mobility the grain boundary junctions on the MacPherson-Srolovitz relation for the growth rate of polycrystalline systems — •Luis Antonio Barrales Mora1, Volker Mohles1, Lasar S. Shvindlerman1,2, and Günter Gottstein1 — 1Institut für Metallkunde und Metallphysik, RWTH Aachen, Kopernikusstr. 14, D-52074 Aachen, Germany — 2Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow District 142432, Russia
Recently, MacPherson and Srolovitz formulated the three-dimensional equivalent to the von Neumann-Mullins relation. In contrast with the latter, the new relation does not include directly the topological class of the grains but relates mainly to their metrics. Since a finite mobility of the boundary junctions (triple lines and quadruple junctions) affects the kinetics of the evolution of the granular system, repercussions in the MacPherson-Srolovitz relation are to be expected. In the present contribution, a three-dimensional vertex model is used in simple granular assemblies for the verification of this important relation. In addition, the effect of a finite mobility of the boundary junctions and its impact on the MacPherson-Srolovitz relation is analysed.