Size effects of dislocation stability in nanocrystals
- 1 July 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (1), 42-46
- https://doi.org/10.1103/physrevb.44.42
Abstract
In this paper the size effect of lattice-dislocation stability in nanocrystals (NC’s) caused by a strong interaction of dislocations with interfaces is analyzed. When the nanocrystallite size l becomes less than the characteristic length Λ, a substantial dislocation redistribution in the nanocrystal may occur. This length is estimated to be dozens of nanometers and depends on the character of interfaces: coherent or incoherent (slipping), on a difference of elastic moduli of NC phases, etc. Simple analytical estimations of Λ on the basis of exact calculations have been obtained.Keywords
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