title: Computer simulation of displacement cascades in nanocrystalline ni.
abstract: Large-scale molecular dynamics of cascade production of the primary damage state are performed in fcc nanocrystalline Ni of average grain diameters of 5 and 12 nm. Primary knock-on atom kinetic energies of 5-30 keV are simulated. During the thermal spike phase, significant atomic motion towards the surrounding grain boundary structure is observed, characterized by many replacement-collision sequences. Upon resolidification, the excess volume condenses to form vacancy dominated defects with a complex partial dislocation network forming at higher energies.
authors.affiliation: Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Samaras
authors.forename: P M
authors.initials: PM
authors.lastname: Derlet
authors.forename: H
authors.initials: H
authors.lastname: Van Swygenhoven
authors.forename: M
authors.initials: M
authors.lastname: Victoria