Thermodynamic assessment of the La–Mg system

A thermodynamic modeling and optimization of the La–Mg system is carried out by means of the CALPHAD method taking into account the latest experimental results. The liquid, bcc-La, fcc-La, dhcp-La and hcp-Mg solutions are modeled as substitutional solutions (La, Mg) using the Redlich–Kister formalis...

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Veröffentlicht in:	Calphad 2011-12, Vol.35 (4), p.580-587
Hauptverfasser:	Berche, A., Benigni, P., Rogez, J., Record, M.-C.
Format:	Artikel
Sprache:	eng
Schlagworte:	CALPHAD method Chemical Sciences Computer simulation Cross-disciplinary physics: materials science rheology Exact sciences and technology Formalism Lanthanum Liquids Magnesium Material chemistry Materials science Mathematical models Optimization Organic chemistry Phase diagrams Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Phase diagrams of metals and alloys Phase transformations Physics Thermodynamic assessment Thermodynamics
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Beschreibung
Zusammenfassung:	A thermodynamic modeling and optimization of the La–Mg system is carried out by means of the CALPHAD method taking into account the latest experimental results. The liquid, bcc-La, fcc-La, dhcp-La and hcp-Mg solutions are modeled as substitutional solutions (La, Mg) using the Redlich–Kister formalism. The LaMg, LaMg2, La5Mg41, La2Mg17 and LaMg12 phases are treated as stoichiometric compounds, and the non-stoichiometry of LaMg3 is described as (La,Mg)0.25Mg0.75. The results are in good agreement with the set of experimental data which were carefully discussed and selected. ► Literature data is presented. ► Previous assessment results are described. ► Assessed parameters are listed. ► Calculated data are compared with experimental data.
ISSN:	0364-5916 1873-2984
DOI:	10.1016/j.calphad.2011.10.001