The Al-Er-Mg ternary system Part I: Experimental investigation |
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Authors: | A Saccone G Cacciamani S De Negri and R Ferro |
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Affiliation: | (1) Università di Genova, Dipartimento di Chimica e Chimica Industriale, via Dodecaneso 31, 16146 Genova, Italy |
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Abstract: | Investigation of phase equilibria in the ternary system Al-Er-Mg has been carried out by means of differential thermal analysis
(DTA), powder x-ray diffraction (XRD), light optical microscopy (LOM), scanning electron microscopy (SEM), and quantitative
electron probe microanalysis (EPMA). The isothermal section at 400 °C has been established. An extended homogeneity region
with Al substitution for Mg at a constant Er content has been found for (Mg1−x
Al
x
)Er (0≤x≤0.78); a few other boundary binary phases give lower ternary solubility. A ternary compound, τ, of Al66.7Er10Mg23.3 stoichiometry, has been found to exist in the isothermal section at 400 °C. |
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