Abstract
High fluence Fe + implantations were performed in commercial aluminium samples using two different iron isotopes, 56Fe + and 57Fe +. The implanted layers were studied by Rutherford backscattering spectrometry, conversion electron Mössbauer spectroscopy, grazing incidence X-ray diffraction, and scanning electron microscopy with energy dispersion spectroscopy. There is clear evidence for the direct formation of the Al 5Fe 2 intermetallic compound during ion implantation. The thermal stability of such an intermetallic phase was studied by means of annealing treatments, and it was found that it disappears after 1 h annealing at 630 °C and a new intermetallic compound, Al 13Fe 4, is formed.
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