Abstract
Abstract Transmission electron microscopy has been applied to the study of damage in gold irradiated with 35 keV He+ ions to fluences of 1014 to 1016 ions/cm2. Damage in as-irradiated specimens consisted of dislocation loops showing double arc contrast which loop analysis revealed to be about 30% to 50% interstitial in nature. Depth distributions of the defect clusters were determined using stereo microscopy. Annealing at increasing temperature resulted in a decrease in loop density together with an increase in loop diameter. Voids formed at annealing temperatures between 0.5 Tm and 0.58 Tm on and in the vicinity of dislocation tangles formed from the loops, and were identified from a through-focus sequence of micrographs and by kinematical imaging. Increasing void diameter with decreasing void density on annealing at higher temperature indicated that the voids were gas filled and were growing via migration and coalescence.
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