The effects of swift Xe ion bombardment on the amorphous structure of a VITROPERM type alloy

摘要

Influence of swift Xe ion irradiation (ion energy of 11.1 MeV/u, ion fluences from 2.5 x 10(12) to 1.0 x 10(13) ions/cm(2)) on the local structural arrangement of a VITROPERM alloy is investigated using synchrotron-based X-ray diffraction, Fe and Nb K-edge X-ray absorption spectroscopy, and Fe-57 Mossbauer spectroscopy techniques. The obtained data show an increase of structural disordering due to ion bombardment. However, no alterations in pairwise interatomic lengths are observed. The irradiation-induced structural modifications can be removed by an appropriate post-irradiation heat treatment. We suggest that the microscopic origin of changes induced by the swift heavy ions could be similar to the structural modifications caused by severe plastic deformation. (C) 2019 Published by Elsevier B.V.