Article ID Journal Published Year Pages File Type
10620689 Acta Materialia 2010 7 Pages PDF
Abstract
The mobility of dislocations is shown to be a size-dependent phenomenon. When dislocations intersect free surfaces, the mobility decreases as the dislocation length decreases, suggesting that dislocation motion in small structures may be more difficult. This increased drag may be related to surface forces acting where the dislocation intersects the free surface or from altered dislocation-phonon interactions. Mobility, however, is not as dependent on the film thickness and converges rapidly to bulk values.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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