Point defect structure and 57Fe
hyperfine parameters of Fe-Al powders doped with Ni, Cu and Cr additions
Chem.
Met. Alloys 1
(2008) 128-132
https://doi.org/10.30970/cma1.0042
Aneta HANC, Janusz
E. FRĄCKOWIAK, Lucjan PAJĄK, Grzegorz DERCZ
In the present work Fe-Al-X (X=Cu;Ni;Cr)
metallic powders produced by the self-decomposition method of Fe-Al doped
alloys were examined by Mőssbauer spectroscopy.
The concentration of Fe vacancies and Fe atoms substituting for Al (Fe-AS) was
determined from the intensities of the sub-spectra in the Mőssbauer
analysis connected with distinct Fe environments. The results show that nickel
and copper produce an increase of the vacancy concentration in comparison with
the values found for Fe-Al metallic powders, whereas chromium decreases the
vacancy concentration, causing a significant increase of the anti-site atom
Fe-AS concentration.
Mössbauer transmission
spectrum for Fe-Al metallic powders obtained by the self-decomposition method. The best fit and component spectra
are drawn with lines, points are experimental data.
Keywords
Iron aluminides / Defects / Point defects / Mőssbauer spectroscopy / Fe-Al