A Dilute-Limit Heat of Solution of 3d Transition Metals in Iron Studied with ~(57)Fe Moessbauer Spectroscopy

摘要

The room-temperature ~(57)Fe Moessbauer spectra for binary iron-based solid solutions Fe_(1-x)D_x with D = V, Cr, Mn and Co, were analysed in terms of binding energy E_b between two D atoms in the Fe-D system. The extrapolated values of E_b for x = 0 were used for computation of the dilute-limit heat of solution of D metals in iron. The results were compared with those derived from calorimetric data concerning the heat of formation of the systems mentioned as well as with those resulting from the Miedema's model of alloys. The comparison shows that our Moessbauer spectroscopy findings are in a qualitative agreement with the available calorimetric data and they are at variance with corresponding Miedema's values for Fe-Mn and Fe-Co systems.