title: Enthalpies of formation of Cd-Pr intermetallic compounds and thermodynamic assessment of the Cd-Pr system.
abstract: In the present study standard enthalpies of formation were measured by reaction and solution calorimetry at stoichiometric compositions of Cd2Pr, Cd3Pr, Cd58Pr13and Cd6Pr. The corresponding values were determined to be -46.0, -38.8, -35.2 and -24.7 kJ/mol(at), respectively. These data together with thermodynamic data and phase diagram information from literature served as input data for a CALPHAD-type optimization of the Cd-Pr phase diagram. The complete composition range could be described precisely with the present models, both with respect to phase equilibria as well as to thermodynamic input data. The thermodynamic parameters of all intermetallic compounds were modelled following Neumann-Kopp rule. Temperature dependent contributions to the individual Gibbs energies were used for all compounds. Extended solid solubilities are well described for the low- and high-temperature modifications of Pr and also for the intermetallic compound CdPr. A quite good agreement with all viable data available from literature was found and is presented.
authors.affiliation: Department of Inorganic Chemistry (Materials Chemistry), University of Vienna, 1090 Wien, Austria.
authors.forename: Thomas L
authors.initials: TL
authors.lastname: Reichmann
authors.affiliation: Department of Inorganic Chemistry (Materials Chemistry), University of Vienna, 1090 Wien, Austria.
authors.forename: Klaus W
authors.initials: KW
authors.lastname: Richter
authors.affiliation: Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy.
authors.forename: Simona
authors.initials: S
authors.lastname: Delsante
authors.affiliation: Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Borzone
authors.affiliation: Department of Inorganic Chemistry (Materials Chemistry), University of Vienna, 1090 Wien, Austria.
authors.forename: Herbert
authors.initials: H
authors.lastname: Ipser
keywords: Alloys; CALPHAD; Enthalpy of formation; Phase diagram Cd–Pr