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Experimental investigation and thermodynamic modeling of the Mg–Sn–Sr ternary system
Calphad ( IF 1.9 ) Pub Date : 2020-12-24 , DOI: 10.1016/j.calphad.2020.102237
Jian Wang , Zhang Zhang , In-Ho Jung , Liyuan Sheng

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 Mg25Sn24Sr14, 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.



中文翻译:

Mg-Sn-Sr三元体系的实验研究和热力学建模

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。

更新日期:2020-12-24
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