An Enthalpy of Solution of Silicon in Iron Studied by 57Fe Mössbauer Spectroscopy
R. Idczak, R. Konieczny and J. Chojcan
Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, 50-204 Wrocław, Poland
Received: September 30, 2015; In final form: February 16, 2016
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The room temperature Mössbauer spectra of 57Fe were measured for Fe1-xSix solid solutions with x in the range 0.01 ≤ x ≤ 0.05. The obtained data were analysed in terms of the binding energy Eb between two silicon atoms in the studied materials using the extended Hrynkiewicz-Królas idea. The extrapolated value of Eb for x=0 was used to computation of an enthalpy of solution HFeSi of Si in α -Fe matrix. It was found that the HFeSi value is negative or Si atoms interact repulsively. The result was compared with corresponding values given in the literature which were derived from experimental calorimetric data as well as with the value resulting from the cellular atomic model of alloys by Miedema.

DOI: 10.12693/APhysPolA.129.367
PACS numbers: 76.80.+y, 75.50.Bb, 82.60.Cx, 82.60.Lf