Physics – Condensed Matter – Materials Science
Scientific paper
2005-10-10
European Physical Journal B - Condensed Matter Physics, 50(1-2), 83-87 (2006)
Physics
Condensed Matter
Materials Science
10 pages, 5 figures, NEXT-SigmaPhi III Conference
Scientific paper
10.1140/epjb/e2006-00034-0
The evolution of grain structures in materials is a complex and multiscale process that determines the material's final properties. Understanding the dynamics of grain growth is a key factor for controlling this process. We propose a phenomenological approach, based on a nonlinear, discrete mass transfer equation for the evolution of an arbitrary initial grain size distribution. Transition rates for mass transfer across grains are assumed to follow the Arrhenius law, but the activation energy depends on the degree of amorphization of each grain. We argue that the magnitude of the activation energy controls the final (sintered) grain size distribution, and we verify this prediction by numerical simulation of mass transfer in a one-dimensional grain aggregate.
Hristopulos Dionissios T.
Leonidakis L.
Tsetsekou A.
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