The isothermal sections of the Mg–Sn–Sr ternary system in the Mg-rich region at 415 and 350 °C have been determined using the scanning electron microscopy (SEM) equipped with energy dispersive X-Ray spectrometry (EDS). The existence of the MgSnSr ternary compound was confirmed in these two isothermal sections. Two new compounds, named Mg₅Sn₃Sr and Mg₂₅Sn₂₄Sr_14, were found in the present work based on the SEM/EDS results. Thermodynamic optimization of the Sn–Sr binary and Mg–Sn–Sr ternary systems were carried out using the CALPHAD (CALculation of PHAse Diagrams) technique. The Modified quasi-chemical model (MQM) was used for the liquid solution which exhibits a high degree of short-range ordering behavior. The solid phases were described with the Compound energy formalism (CEF). Finally, a self-consistent thermodynamic databases for the Mg–Sn–Sr ternary system has been constructed in the present work, which can be an efficient and convenient guidance to investigate and develop the Mg-based alloys.

使用配备了能量色散X射线光谱仪（EDS）的扫描电子显微镜（SEM）确定了415和350°C时富镁区域Mg-Sn-Sr三元系统的等温截面。在这两个等温区中证实了MgSnSr三元化合物的存在。基于SEM / EDS结果_，在本工作中发现了两种新的化合物，分别称为Mg ₅ Sn ₃ Sr和Mg ₂₅ Sn ₂₄ Sr ₁₄。Sn-Sr二元体系和Mg-Sn-Sr三元体系的热力学优化是使用CALPHAD（PHA se D的CAL计算）进行的图）技术。修改后的准化学模型（MQM）用于液体溶液，该溶液显示出高度的短程有序行为。固相用复合能量形式学（CEF）描述。最后，在本工作中建立了Mg-Sn-Sr三元系的自洽热力学数据库，可以为研究和开发Mg基合金提供有效而便捷的指导。