通过添加Dy和Ga改善纳米复合永磁合金的磁性能(英文)  

Improvement of Magnetic Properties of Nanocomposite Permanent Magnetic Alloys with Dy and Ga Substitutions

作　　者：张敏刚[1] 柴跃生[1] 孙钢[1] 郭东城[1] 金志浩[2] 

机构地区：[1]太原重型机械学院材料科学与工程分院,太原030024 [2]西安交通大学材料力学性能国家重点实验室,西安710049

出　　处：《太原重型机械学院学报》2002年第3期210-215,共6页Journal of Taiyuan Heavy Machinery Institute

基　　金：山西省自然科学基金资助项目 (2 0 0 2 10 6 7)

摘　　要：采用快淬及热处理工艺 ,通过复合添加Dy和Ga ,制备了高磁性能的NdFeB纳米复合永磁合金。最佳条件下 ,添加Dy和Ga的合金磁性能为Jr =1.16T、Hci =5 80 .92kA/m和 (BH) max=16 2 .74kJ/m3;而不含Dy和Ga的NdFeB合金为Jr =1.18T、Hci =379.5kA/m和 (BH) max =119.5kJ/m3。X射线衍射和透射电子显微分析表明两种合金均由 2 :14 :1硬磁相和α -Fe软磁相组成。 2 :14 :1相晶粒尺寸在两合金中相当 ,但添加Dy和Ga的合金的αThe Dy and Ga substituted NdFeB nanocomposite permanent magnetic alloys with high magnetic properties have been prepared by proper wheel speed of melt spinning and post annealing treatment. Under optimal conditions, compared with the best magnetic properties of ternary NdFeB alloy of J r=1.18T, H ci =379.5kA/m and (BH) max =119.5kJ/m3, the best magnetic properties of the alloy with Dy and Ga substitutions are J r=1.16T, H ci =580.5kA/m, and (BH) max =162.7kJ/m3. The XRD and TEM results showed that each of two alloys consists of hard magnetic 2:14:1 phase and soft magnetic α Fe phase. The grain size of 2:14:1 phase is about equal in two alloys. The grain size and content of α Fe phase in Dy and Ga substituted alloy are finer and lower respectively.

关 键 词：永磁合金 磁性材料 纳米结构 电子显微术 X射线衍射 显微组织 镝 镓 

分 类 号：TM273[一般工业技术—材料科学与工程]