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2008 | 114 | 6 | 1555-1562
Article title

A Study of Point Defects in the B2-Phase Region of the Fe-Al System by Mössbauer Spectroscopy

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EN
Abstracts
EN
In this work, we employed the Mössbauer spectroscopy and X-ray powder diffraction in a study of point defect formation in intermetallic phases of the B2 structure of the Fe-Al system as a function of Al concentration. The results are compared with the concentrations of point defect determined from positron annihilation data. In the Mössbauer effect, two types of samples are investigated: Fe-Al alloys with few additives obtained by induction melting and Al-rich metallic powders produced by the self-decomposition method and intensive grinding of high energy in the electro-magneto-mechanical mill. We present the values of the ^{57}Fe isomer shift and quadrupole splitting for the components describing the point defect in the local environment of a Mössbauer nuclide. The concentration of the Fe vacancies and Fe atoms substituting Al (Fe-AS) are determined. The results showed that an increase in Al content causes an increase in vacancy and Fe-AS concentration.
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Contributors
author
  • Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland
author
  • Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland
author
  • Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland
author
  • Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland
author
  • Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, Warsaw, Poland
author
  • Institute of Chemistry, Silesian University, Szkolna 9, 40-007 Katowice, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv114n610kz
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