| NUKLEONIKA 2013, 58(1):93-97
THERMODYNAMIC PROPERTIES OF Au-Fe ALLOYS STUDIED
WITH 57Fe MOSSBAUER SPECTROSCOPY
Rafa³ Idczak, Robert Konieczny, Jan Chojcan
University of Wroc³aw, Institute of Experimental Physics,
9 M. Borna Sq., 50-204 Wroc³aw, Poland
The room temperature Mössbauer spectra of 57Fe were measured for Au1–xFex alloys with x in the range 0.01 =< x =< 0.03. The obtained data were analysed in terms of short range order parameter (SRO) and the binding energy Eb between two iron atoms in the studied materials using the extended Hrynkiewicz-Królas idea. The estimated negative SRO parameters and the positive binding energy suggest ordering tendencies in Au-Fe alloys at low iron concentration. The extrapolated value of Eb for x = 0 was used for the computation of enthalpy of the solution of Fe in Au. The results were compared with the corresponding data derived from calorimetric measurements, previous Mössbauer experiments and resulting from the cellular atomic model of alloys by Miedema.
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