摘要
本研究利用CALPHAD方法,采用合理的热力学模型,热力学优化计算了Nd-Dy、Dy-B二元系和Fe-B-Dy、Dy-Fe-Nd、B-Dy-Nd三元系的相图,并利用文献报道的其他子二元系和三元系的热力学参数,充分考虑了热力学模型的统一性和参数的兼容性,建立了Nd-Fe-B-Dy四元系合金的热力学数据库,并应用该数据库,预测了Nd-Fe-B-Dy四元合金Nd16-xDyxFe77B7(x≤5at%)的纵截面相图;同时还分析了一系列不同Dy含量的永磁合金在平衡凝固下各相相分数随温度的变化情况。这些计算信息对掺镝NdFeB永磁合金的组织设计以及制备工艺参数的选择具有重要的指导意义。
The CALPHAD method was used to optimize and calculate the phase diagrams of Dy-Nd,B-Dy binary systems and Fe-B-Dy,Dy-Fe-Nd and B-Dy-Nd ternary systems.With taking into account the consistency of the thermodynamic models,the thermodynamic databases of Nd-Fe-B-Dy quaternary alloys were established by the thermodynamic parameters of binary and ternary sub-systems reported in the literature.The longitudinal cross-section phase diagrams of Nd-Fe-B-Dy quaternary alloy Nd16-xDyxFe77B7(x≤5 at%)were predicted by using these databases.At the same time,the variation of the fractions of each phase of the permanent magnet alloy with different Dy contents under equilibrium solidification was analyzed.These results could be helpful for the micro structure design of the Dy-doped NdFeB permanent magnet alloy and the selection of the preparation process parameters.
作者
王翠萍
卢勇
邓育灵
郭毅慧
黄艺雄
陈梦华
栗周
刘兴军
刘国征
Wang Cuiping;Lu Yong;Deng Yuling;Guo Yihui;Hua ng Yixiong;Chen Menghua;Li Zhou;Liu Xingjun;Liu Guozheng(College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University,Xiamen 361005,China;Department of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014030,China;Baotou Research Institute of Rare Earths,Baotou 014030,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第9期3021-3029,共9页
Rare Metal Materials and Engineering
基金
Open Fund of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization(2017Z1951)
National Natural Science Foundation of China(51771158)。
