Sub-Surface Defects Induced by Low Energy Ar+ Sputtering of Silver
Induced defects in silver polycrystalline samples irradiated with 4 keV Ar+ were characterised with slow positron implantation spectroscopy. The implanted gas was found to interact with ion irradiation defects. The evolution of the defects and gas-defect interactions were followed through a multi-step isochronal annealing treatment. Two different defected regions were detected. A region near to the surface, due to a distribution of vacancy-like defects produced by irradiation, and a deeper one due to coalescence of Ar. The deeper defects evolve with thermal treatments and probably produce cavities which are not easily recovered.
Paula Maria Vilarinho
M. Duarte Naia et al., "Sub-Surface Defects Induced by Low Energy Ar+ Sputtering of Silver", Materials Science Forum, Vols. 514-516, pp. 1608-1612, 2006