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Re-investigation of the La–Mg phase diagram

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Abstract

Literature results on the La–Mg binary system are critically reviewed. It is shown that most recent experimental results are not in agreement with the previously published assessments of the system. Thus, an experimental re-investigation of this phase diagram is required. Several alloys are synthesized from pure constitutive elements and characterized using X-ray diffraction, scanning electron microscopy, and differential thermal analysis. This study clarifies the phase equilibria in the La–Mg system. These results combined with the recent study of the enthalpies of formation of the intermediate compounds of this system provide a sound basis for the Calphad optimization of the system.

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Authors and Affiliations

  1. CNRS, IM2NP (UMR 6242), Aix-Marseille Université, FST Saint-Jérôme, Av. Escadrille Normandie Niémen—Case 251, 13397, Marseille Cedex, France

    Alexandre Berche, Pierre Benigni, Jacques Rogez & Marie-Christine Record

Authors
  1. Alexandre Berche
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  2. Pierre Benigni
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  3. Jacques Rogez
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  4. Marie-Christine Record
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Corresponding author

Correspondence to Alexandre Berche.

Appendix

Appendix

See Table 6.

Table 6 Transition temperatures (T, in K) determined by DTA in the solid phases of the La-Mg system. These temperatures were determined with various heating and cooling rates (V, in K/min). V is positive for heating and negative for cooling. ∆T corresponds to the uncertainty
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Berche, A., Benigni, P., Rogez, J. et al. Re-investigation of the La–Mg phase diagram. J Therm Anal Calorim 107, 797–807 (2012). https://doi.org/10.1007/s10973-011-1441-9

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  • DOI: https://doi.org/10.1007/s10973-011-1441-9

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