Mechanism of Shear-Induced Alignment in Bilayer Thin Films of Spherical Particles

TitleMechanism of Shear-Induced Alignment in Bilayer Thin Films of Spherical Particles
Publication TypeJournal Article
Year of Publication2007
AuthorsRottler, Jörg, and David J. Srolovitz
JournalPhysical Review Letters
Volume98
Pagination175503
AbstractThe phenomenon of shear-induced alignment in polycrystalline bilayer systems is analyzed using Brownian dynamics simulations. We show that the alignment process can be explained in terms of a local grain boundary migration mechanism. Both microscopic and continuum models are constructed that predict the boundary migration velocity as a function of local structure and shear stress. In the continuum picture, shear-induced potential energy gradients act as the driving force for migration, and the grain boundary mobility is sensitive to the degree of misorientation between the grains.
URLhttp://link.aps.org/doi/10.1103/PhysRevLett.98.175503
DOI10.1103/PhysRevLett.98.175503
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