Phase relations and crystallographic data for the Pr-Zn system

Thermodynamic modeling of the Ce–Zn and Pr–Zn systems

“…Saccone et al [17] studied the Pr-Zn phase diagram in the Pr-rich region up to 50 at.% Zn and confirmed the literature data from Mason and Chiotti [16], with slight differences in the temperature of the invariant equilibria by differential thermal analysis, X-ray powder diffractometry, metallographic analysis and quantitative electron probe microanalysis. This work However, the congruent melting temperature of the PrZn phase determined by Saccone et al [17] is 900 • C, and the corresponding result from Mason and Chiotti [16] is 882 • C. Chiotti and Mason [18] derived the equations for the excess molar Gibbs free energy of liquid alloys and the Gibbs free energies, enthalpies and entropies of formation for the intermetallic compounds based on the vapor-pressure data obtained by the dewpoint method, Johnson and Yonco [11] also obtained the equations for the standard Gibbs free energy of formation of the PrZn 11 phase and the partial molar excess Gibbs free energy of Pr in dilute solutions of Pr in liquid Zn by means of the electromotive force measurements.…”

“…7. The calculated phase diagram of the Pr-Zn system with experimental data [16,17]. the composition dependence of the equation in the range from 0 to 17.7 at.% Zn by extrapolation, thus our calculated results are considered to be acceptable.…”

“…Okamoto [12] reviewed the phase diagram of the Pr-Zn system, based on the experimental data [16], as shown in Fig. 2, in which the temperature of the polymorphic transformation in PrZn 2 and the liquidus temperature in the Zn-rich portion are still being tentative.…”

“…The phase diagram in the Pr-Zn system was mainly investigated by Mason and Chiotti [16], who measured the whole composition range of the phase diagram by using the metallographic, thermal, X-ray and resistivity data, and determined the phase stability of the PrZn, PrZn 2 , PrZn 3 , Pr 3 Zn 11 , Pr 13 Zn 58 , Pr 3 Zn 22 , Pr 2 Zn 17 and PrZn 11 compounds. Saccone et al [17] studied the Pr-Zn phase diagram in the Pr-rich region up to 50 at.% Zn and confirmed the literature data from Mason and Chiotti [16], with slight differences in the temperature of the invariant equilibria by differential thermal analysis, X-ray powder diffractometry, metallographic analysis and quantitative electron probe microanalysis.…”

“…For the Pr-Zn binary system, the experimental data on the phase diagram and thermodynamic properties [11,[16][17][18] were Fig. 8.…”