Abstract
The room temperature Mössbauer spectra of 57Fe were measured for iron-based solid solutions –Cr containing 3 to 10 at% of Cr. The obtained data were analysed in terms of the binding energy Eb between two Cr atoms in iron crystal using the extended Hrynkiewicz-Kr�las idea. It turned out that the energy is positive or the nature of the Cr pair interaction in the iron crystal is repulsive. Moreover, the value of the energy Eb is practically constant for the examined samples containing more than 5 at% of Cr and it amounts to about +20 meV. At the same time the Eb value mentioned is in a good agreement with that resulting from the semi-empirical Miedema-Królas model; the latter is +15 meV. From the above, one can suggest that the Hrynkiewicz-Królas method based originally on investigations of very dilute ternary systems can be successfully used (in its extended form) while studying relatively concentrated binary iron-based solid solutions. The concentration of the solute atoms should be at least 5 at%.
