PREPARATION AND MAGNETIC PROPERTIES OF THE EXCHANGE COUPLING NDFEB NANOCOMPOSITED PERMANENT MAGNETS

摘要：

The effect of indium additions on the microstructures and magnetic properties of Nd9Fe85-xB B 6Inx (x=0-2) nanocomposites prepared by melt spinning was investigated. It was found that certain amount of indium added to Nd9Fe85B6 B magnets enhances the hard magnetic properties. The coercivity and remanence ratio of the magnet with 0.5 at.％ indium increases from 405kA/m (no indium) to 465kA/m and from 0.7 to 0.86 respectively. Squareness of its hysteresis loop is also improved greatly. The optimum energy product (BH)max increases remarkably from 95kJ/m 3 to 145kJ/m 3 . The origin for those enhancements is mainly attributed to the magnetically softened grain boundaries and enhanced crystallographical coherency by indium addition. The magnetic annealing is found to be helpful to enhance the coherency and coupling between hard and soft phases.

关键词： Nanocomposite NdFeB Exchange coupling Nanostructure Magnetic property

作者: Zongjun Tian Shangdong Li Youwei Du Yinhui Huang

作者单位: Laser Rapid Prototyping Center, College of Mechanical and Electrical Engineering, Nanjing University Department of Physics, Fujian Normal University, Fuzhou 350007, China Department of Physics, Nanjing University, Nanjing 210093, China

会议类型: 国际会议

会议名称: 2007年微纳系统集成及其商业化应用国际学术会议(2007 International Conference & Exhibition on Integration and Commercialization of Micro and Nano-Systems)

会议地点: 海南三亚

会议语种:英文

在线出版日期: 2007-01-10（万方平台首次上网日期，不代表论文的发表时间）