Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9纳米晶磁粉芯制备及性能  

Fabrication and magnetic properties of Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 nanocrystalline soft magnetic powder cores

作　　者：莫健 熊祖钊[1] 刘辛[2] 王健 汪汝武[1] MO Jian;XIONG Zu-zhao;LIU Xin;WANG Jian;WANG Ru-wu(College of Science,Wuhan University of Science and Technology,Wuhan 430065,China;Guangdong Institute of Materials and Processing,Guangdong Academy of Sciences,Guangzhou 510650,China)

机构地区：[1]武汉科技大学理学院,湖北武汉430065 [2]广东省科学院广东省材料与加工研究所,广东广州510650

出　　处：《磁性材料及器件》2019年第1期12-16,共5页Journal of Magnetic Materials and Devices

基　　金：湖北省自然科学基金资助项目(2014CFA121);广州市科技计划项目(201604016103);广东省应用型科技研发专项(2015B010136004)

摘　　要：以REN50作为绝缘粘结剂用粉末冶金工艺制备了Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9纳米晶磁粉芯,并讨论了粉末退火温度及粘结剂含量、成型圧力对磁粉芯性能的影响。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、差示扫描量热仪(DSC)及B-H分析仪对磁粉芯的结构和磁特性进行分析。结果表明,REN50作为绝缘粘结剂可有效包覆在粉末表面,且经过500℃热处理后仍然能够稳定存在,Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9纳米晶磁粉芯具备良好的磁性能。随着粘结剂含量的增加,磁粉芯的磁导率先减小后增大再减小,损耗先增大后减小,当含量为3%时综合磁性能最佳;随着成型压力的增大,磁粉芯的磁导率先增加后减小,损耗先降低后增高,当压力在1100 MPa时,综合磁性能最佳。Fe73.5Cu1Nb3Si13.5B9 nanocrystalline magnetic powder cores were prepared by power metallurgy(PM)method.The effects of annealing temperature of powder,binder content,and molding pressure on its microstructure and properties were investigated.The microstructure and magnetic properties of Fe73.5Cu1Nb3Si13.5B9 powder and powder cores were analyzed by scanning electron microscope(SEM),X-ray diffraction(XRD),differential scanning calorimetry(DSC),and B-H analyzer,respectively.The results show that REN50 as an insulating binder can be effectively coated on the surface of the powder,and it can still exist stably after heat treatment at 500℃.The Fe73.5Cu1Nb3Si13.5B9 nanocrystalline magnetic powder cores have good magnetic properties.The apparent permeability(μa)decreases firstly and then increases and decreases finally,core loss(Pcv)decreases firstly and then increases with increasing binder content.Magnetic properties exhibit its maximum at the binder content of 3%;the apparent permeability increases firstly and then decreases and core loss decreases firstly and then increases with the increasing of forming pressure.Magnetic properties exhibit its maximum at the 1100 MPa.

关 键 词：Fe73.5Cu1Nb3Si13.5B9纳米晶 磁粉芯 磁导率 损耗 

分 类 号：TM271[一般工业技术—材料科学与工程]