Isothermal Sections in the Mg-Corner of Mg-Er-Sn Ternary System at 300, 400 and 500 °C.

The phase equilibria in the magnesium (Mg) rich corner of the Mg-Er-Sn ternary system at 300, 400 and 500 °C have been determined through key alloy method by means of x-ray diffraction and scanning electron microscopy with assistance of energy dispersive spectroscopy. The results show that in the composition range of our studied, each isothermal section consists of five single-phase regions, seven two-phase regions, and three three-phase regions, four compounds, i.e. MgSn, ErMgSn, ErSn and ErMg are found in equilibrium with the Mg solid solution. The homogeneity ranges of Mg solid solution as well as the solid solubilities of the intermediate phases at different temperatures are reported. [ABSTRACT FROM AUTHOR]