A Search for Thermal Vacancies Forming Close Frenkel Pairs in Fe-Cr Alloys

• Authors: J. Chojcan
• Languages of publication: EN

Abstracts

EN

The room temperature Mössbauer spectra of ^{57}Fe were measured for the bcc Fe_{0.948}Cr_{0.052} solid solution quenched into water being at about 295 K from different temperatures not exceeding 1000 K, i.e. from the temperatures for which probabilities of formation of "clear" (Schottky) vacancies as well as vacancies forming the separate interstitial-vacancy (Frenkel) pairs are negligibly low. The obtained data were analysed in terms of concentration of unoccupied places in the 14-site surroundings of an ^{57}Fe Mössbauer probe in the sample. It turned out that the concentration of vacancies detected by the probe increases with temperature very rapidly - at the rate of about 10^{-4} K^{-1}. The result may suggest that the Mössbauer probe is sensitive to a possible thermal distortion of the lattice or creation of very close Frenkel pairs (the interstitial is the nearest neighbour of the vacant lattice site).

Keywords

EN

61.72.Ji; 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)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: 5
• Pages: 723-729

Dates

published

2001-11

received

2001-05-14

Contributors

author

J. Chojcan

• Institute of Experimental Physics, University of Wrocław, Pl. M. Borna 9, 50-204 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.100.723