Experimental determination of the thermodynamic properties of the Laves phases in the Cr-Fe-Nb system

Standard enthalpies of formation, DfH, of the Laves-phases within their solid solutions along the Cr2Nb-Fe2Nb section were measured using drop solution calorimetry for the first time. The enthalpy values change linearly from -2.9 kJ mol-1 atom-1 for binary C15-Cr2Nb to -13.6 kJ mol-1 atom-1 for C14-Fe2Nb. The obtained values are compared with some earlier results on the binary compounds gathered mostly from ab initio calculations. © 2015 Elsevier B.V. All rights reserved.