Abstract
Isothermal section of Mg–Zn–Zr ternary system at 345 ∘C has been determined by X-ray diffraction, differential scanning calorimetry and scanning electron microscopy assisted with energy dispersive X-ray spectroscopy using a series of Mg–Zn–Zr alloys. The results show that there exist three intermetallic compounds ZnZr, Zn 2Zr 3, (Mg,Zn) 2Zr, and a liquid phase in equilibrium with the α -Mg phase. The presence of two other three-phase regions in equilibrium, Liquid+MgZn+(Mg,Zn) 2Zr and MgZn+Mg 2Zn 3+(Mg,Zr)Zn 2, has also been confirmed. The addition of Zn can significantly increase the solubility of Zr and vice-versa in the α -Mg matrix.
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