Temperature dependence of the short-range order parameter for Fe_0.90Cr_0.10and Fe_0.88Cr_0.12alloys

• Autorzy: Rafał Idczak , Robert Konieczny
• Języki publikacji: EN

Abstrakty

EN

The 57Fe Mössbauer spectra for the iron-based solid solutions Fe0.90Cr0.10 and Fe0.88Cr0.12 were measured at different temperatures ranging from 300 K to 900 K. Analysis of the obtained spectra shows that the distribution of impurity atoms in the two first coordination shells of 57Fe nuclei is not random and it cannot be described by the binomial distribution. Quantitatively, the effects were described in terms of the atomic short-range order (SRO) parameters and the pair-wise interaction energy with the help of a quasi-chemical type formulation introduced by Cohen and Fine. The obtained results reveal strong clustering-type correlations in the studied samples (a predominance of Fe-Fe and Cr-Cr bonds). Moreover, the changes in SRO values observed during thermal processing suggest that the distribution of Cr atoms in an α-iron matrix is strongly temperature dependent.

Słowa kluczowe

EN

iron alloys; Mössbauer spectroscopy; nuclear materials; short-range order

• Czasopismo: Nukleonika
• Rocznik: 2015
• Tom: 60
• Numer: 1
• Strony: 35-38

Daty

wydano

2015-03-01

otrzymano

2014-06-18

zaakceptowano

2014-10-16

online

2015-03-12

Twórcy

autor

Rafał Idczak

• Institute of Experimental Physics, University of Wrocław, 9 M. Borna Sq., 50-204 Wrocław, Poland, Tel.: [phone], Fax: [phone],

autor

Robert Konieczny

• Institute of Experimental Physics, University of Wrocław, 9 M. Borna Sq., 50-204 Wrocław, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

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Identyfikatory

DOI

10.1515/nuka-2015-0009