2024年4月12日发(作者：)

Mg-RE（Y-Gd）-Zn体系中长周期有序

堆垛相的相平衡及热力学研究

摘要：

本研究利用热力学计算方法探讨了Mg-RE（Y/Gd）-Zn体系中

长周期有序堆垛相的相平衡及热力学性质。首先通过实验研究

得到了Mg-RE（Y/Gd）-Zn体系的等温和等压相图，并采用

CALPHAD方法和Thermo-calc软件进行了热力学模拟。研究结

果表明，长周期有序堆垛相的生成与热力学参数（如温度、压

力、成分比等）密切相关。通过计算得到了不同温度下的平衡

相组成，进一步探讨了长周期有序堆垛相的热力学稳定性和相

变行为，发现在一定条件下可以实现相变。最后，我们对该体

系进行了深入分析，并提出了未来的研究方向。

关键词：Mg-RE（Y/Gd）-Zn体系；长周期有序堆垛相；相平

衡；热力学性质；相变行为

Abstract:

In this study, the phase equilibrium and thermodynamic

properties of long-period ordered stacking phases in

the Mg-RE (Y/Gd)-Zn system were investigated using

thermodynamic calculation method. Firstly, the

isothermal and isobaric phase diagrams of the Mg-RE

(Y/Gd)-Zn system were obtained through experimental

studies, and thermodynamic simulation was carried out

using the CALPHAD method and Thermo-calc software. The

results showed that the formation of long-period

ordered stacking phases was closely related to

thermodynamic parameters such as temperature, pressure,

and composition ratio. The equilibrium phase

composition at different temperatures was calculated,

and the thermodynamic stability and phase transition

behavior of long-period ordered stacking phases were

further explored. It was found that phase transition

could be realized under certain conditions. Finally,

we conducted a deep analysis of this system and

proposed future research directions.

Keywords: Mg-RE (Y/Gd)-Zn system; long-period ordered

stacking phase; phase equilibrium; thermodynamic

properties; phase transition behavior

In the present study, we investigated the Mg-RE

(Y/Gd)-Zn system and studied the phase equilibrium and

thermodynamic properties of the long-period ordered

stacking phases in the binary and ternary alloys. The

experimental measurements of the phase diagrams and

thermodynamic properties were carried out using X-ray

diffraction, scanning electron microscopy, and

differential scanning calorimetry.