Abstract
In situ ion-beam irradiation was used to study irradiation induced grain growth in co-sputter-deposited Zr/xFe (0%⩽x⩽4.5%) nanocrystalline thin films. Samples were irradiated with 500keV Kr ions to fluences in excess of 1016ions/cm2 (on the order of 80–100dpa), at irradiation temperatures ranging from 20K to 573K. The average grain size increased monotonically with ion fluence until it reached a saturation value which depends both on temperature and on the presence of Fe. Similarly to thermal grain growth, the ion irradiation induced grain growth curves could be best fitted with curves of the type: Ln-L0n=KΦ. Grain growth at 20K is similar to that which occurs at 298K. Above 298K, the rate of grain growth increases with irradiation temperature.
Published Version
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