Experimental study and thermodynamic assessment of the erbium–hydrogen binary system

The erbium–hydrogen (Er–H) binary system has been investigated experimentally. New solubility limits and extensions of the homogeneity domains have been measured, using several experimental techniques, and high purity materials. A thermodynamic assessment of the system using the Calphad method has been performed. The calculated phase diagram shows a fair agreement with the experimental data. Both experimental and calculated phase diagrams obtained differ significantly from the one available in the literature.