Effect of a Finite Boundary Junction Mobility on the Growth Rate of Two and Three Dimensional Grains

Abstract:

t has been shown by computer simulations that the MacPherson-Srolovitz relation predicts accurately the growth rate of a grain undergoing ideal grain growth. However, since a finite mobility of the boundary junctions (triple lines and quadruple junctions) affects the evolution of a granular system, it is necessary to modify this equation in order to take into account their effect. In the present contribution, an equation which allows considering these factors is presented and used to modify the von Neumann-Mullins and MacPherson-Srolovitz equations. In order to corroborate these equations two and three dimensional network model simulations were performed. The results showed a very good agreement with the theoretical approaches for both dimensions and all topological classes except those near the classes of zero growth rate in 3D. The reason is that the proposed function is very sensitive to small changes of the finite mobility of the junctions.

• Periodical: Materials Science Forum (Volumes 715-716)
• Pages: 574-578
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.715-716.574
• Online since: April 2012
• Authors: Luis A. Barrales Mora
• Keywords: Finite Mobility of Triple Junctions, Grain Growth, MacPherson-Srolovitz Equation, Von Neumann-Mullins Relation

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