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

• Authors: A. Hanc , J. Kansy , G. Dercz , L. Pająk , D. Oleszak , J. Mrzigod
• Languages of publication: 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.

Keywords

EN

75.50.Bb; 61.72.J-; 76.80.+y

Discipline

• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 61.72.J-: Point defects and defect clusters
• 75.50.Bb: Fe and its alloys

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 6
• Pages: 1555-1562

Dates

published

2008-12

Contributors

author

A. Hanc

• Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland

author

J. Kansy

• Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland

author

G. Dercz

• Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland

author

L. Pająk

• Institute of Materials Science, Silesian University, Bankowa 12, 40-007 Katowice, Poland

author

D. Oleszak

• Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, Warsaw, Poland

author

J. Mrzigod

• Institute of Chemistry, Silesian University, Szkolna 9, 40-007 Katowice, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.114.1555