Tin-vacancy interaction was studied in a dilute Al(Sn) alloy, quenched from 613°C to -70°C and isochronally heat treated up to 250°C, using parallel positron lifetime and Mössbauer spectroscopy. For the interpretation of the results, a simple model was developed including tin-monovacancy tin-divacancy and tin-tetravacancy complexes as well as more complicated tin-vacancy agglomerates as important participants of the recovery process. According to this model, the changes observed in the positron lifetime and Mössbauer spectra can be explained by the gradual transformation of these complexes to simpler ones through transitional configurations. Only two lines could be observed in the Mössbauer spectra and the results suggest that a single vacancy has minor effect on the isomer shift of the line corresponding to tin in substitutional lattice site.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry