Experimental investigation and thermodynamic calculation of the Mg–Mn–Sr system

摘要: Abstract Both experimental investigation and thermodynamic modeling were performed for the Mg–Mn–Sr system. Four decisive alloys selected prepared using a powder metallurgy method to measure isothermal section at 500 °C via combination of X-ray diffraction (XRD) electron probe microanalysis (EPMA). No ternary compound has been observed this three-phase regions, (Mg)+(αMn)+Mg 17 Sr 2 , Mg +(αMn)+Mg 38 9 23 6 Sr, have identified 500 °C. appreciable solubility detected in binary Mg–Sr compounds. Phase transition temperatures measured by means differential scanning calorimetry (DSC) measurements. In present modeling, substitutional solution model was used describe liquid phase. Due high evaporability Mg, Mn gas phase can affect higher temperature equilibria system thus included modeled as an ideal mixture. The calculations match well with data, indicating that no parameters are needed description. order verify reliability current system, five as-cast Mg-rich corner prepared. calculated liquidus projection is consistent primary regions. reliable be development alloys.