Co-Fe-Gd合金系非晶形成能力的热力学研究

Thermodynamic investigation on glass-forming ability of Co-Fe-Gd alloy system

在Co-Fe-Gd三元系合金体系的热力学优化评估的基础之上,应用CALPHAD技术,研究此三元非晶合金的玻璃形成能力。本文分析了800 K时Co-Fe-Gd合金中各元素含量对非晶形成能力的影响,预测了非晶形成的最优成分,计算过冷液相中的结晶相形成驱动力。通过与部分实验和非晶共晶点准则的比较可见,本文所做的热力学分析对此三元合金的非晶制备具有一定的理论指导意义。

Glass-forming ability （GFA） of Co-Fe-Gd amorphous alloys was analyzed on the basis of the thermodynamics description of the ternary alloy sys＇tem by means of CALPHAD technique. This work was aimed at forecasting the optimal composition for glass-forming and calculating the driving forces for the formations of all crystalline phases of the supercooled liquid states. In comparison of some experiments with the deep eutectic point, it is found that this thermodynamics analysis can provide a certain theoretical guiding for fabrication of the ternary amorphous alloy.