作者:连利仙,刘颖,高升吉,涂铭旌
关键词:metal materials; Zirconium; nanocomposite magnets; microstructure; magnetic properties; rare earths
单位:College of Materials Neodymium Magnets
http://www.999magnet.com/products/110-sintered-neodymium-magnets Science & Engineering, Sichuan University, Chengdu 610065,China








,College of Materials Science & Engineering, Sichuan University, Chengdu 610065,China








,College of Materials Science & Engineering, Sichuan University, Chengdu 610065,China








,College of Materials Science & Engineering, Sichuan University, Chengdu 610065,China
摘要:Five kinds of bonded magnets with compositions of Nd_(10.5)Fe_(78.4-x)Co_5Zr_xB_(6.1)(atom percentage x=0,1.0,(1.5),2.0,2.5)were prepared by rapid quenching, post heat treatment and mould-pressing.The microstructure and crystallization behavior were studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and atomic force microscopy (AFM). The results suggest that high content of Zr can increase the glass formation ability (GFA) of alloys. When the content of Zr is controlled at a certain level, Fe_2Zr with high melting point is formed in the alloys, and grain size is reduced consequently. At the same time, because of Zr addition, the coercivity and squareness of demagnetization loop are obviously improved, and the energy product is accordingly increased. As a result, optimal magnetic properties of Nd_(10.5)Fe_(78.4-x)Co_5Zr_xB_(6.1)(B_r=0.659 T,H_(cj)=628 kA·m~(-1),H_(cb)=419 kA·m~(-1),(BH)_m=73 kJ·m~(-3)) are obtained when x=2.