The interaction of a self-interstitial atom with small clusters (7 or 19 self-interstitial atoms) in α-Fe was studied by atomic computer simulation using an interatomic potential of EAM type. Metastable configurations were investigated by annealing the system at 50 and 100K. The interstitial exhibited 6 non-equivalent configurations that lead to different behaviour under the stress field of the cluster. Special configurations, formed when the self-interstitial atom joins the cluster, that prevent cluster motion were described. The region where the interstitial was attracted to and joins the cluster and the binding energy map were presented. The capture distance and recombination energy of a vacancy interacting with the same clusters, calculated with the same potential, was given for comparison.

Interaction of a Single Interstitial Atom with Small Clusters of Self Interstitials in α-Fe. N.Anento, A.Serra: Journal of Nuclear Materials, 2008, 372[2-3], 239-48