Dislocation nucleation from near surface void under static tensile stress in Cu

作者：Pohjonen A S^*; Djurabekova F; Nordlund K; Kuronen A; Fitzgerald S P

来源：Journal of Applied Physics, 2011, 110(2): 023509.

DOI：10.1063/1.3606582

We examine a possible mechanism for the formation of protrusions on a metallic surface held in a sufficiently high electric field in the presence of a near-surface void. By means of molecular dynamics simulations we show that the high tensile stress exerted on a Cu {110} surface with a near-surface void can promote the nucleation of dislocations on the void surface. These dislocations cause slip along {111} crystallographic planes leading to mass transport in the volume above the void. We find a linear correlation between the radius of the void and the maximum depth for the growth to occur.

• 出版日期2011-7-15