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

• Published in: Thermochimica acta Vol. 624; pp. 47 - 54
• Main Authors: Syutkin, E.A., Jacob, A., Schmetterer, C., Khvan, A.V., Hallstedt, B., Dinsdale, A.T.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20.01.2016
• Subjects: Cr–Fe–Nb system; Enthalpy of formation; High temperature calorimetry; Laves phases; Enthalpy of formation; Laves phases; Cr–Fe–Nb system; High temperature calorimetry
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2015.12.001

•The Cr–Fe–Nb system was investigated using drop solution calorimetry.•The standard enthalpies of formation of the 8 Laves phases were measured.•Values of the enthalpies of formation from this work differ from previous studies. Standard enthalpies of formation, ΔfH, 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 −2.9kJmol−1atom−1 for binary C15-Cr2Nb to −13.6kJmol−1atom−1 for C14-Fe2Nb. The obtained values are compared with some earlier results on the binary compounds gathered mostly from ab initio calculations.