纳米晶交换耦合稀土永磁体制备及磁性能研究  

Preparation and Magnetic Properties of Nanocrystalline Exchange-coupling Rare-earth Permanent Magnet

作　　者：杨仕清[1] 张万里[1] 龚捷 彭斌[1] 王豪才[1] 

机构地区：[1]电子科技大学

出　　处：《应用科学学报》1999年第4期411-415,共5页Journal of Applied Sciences

基　　金：国防预研基金

摘　　要：利用熔体快淬工艺制备了成分为Ｎｄ８．１６Ｄｙ１Ｆｅ８５．２６Ｎｂ１Ｂ４．５８合金的非晶快淬条带，对非晶条带及其随后的晶化样品进行了微结构分析与表征，利用振动样品磁强计（ＶＳＭ）对样品进行了磁性能及其随温度变化关系的测试，探讨了晶化温度和退火时间及Ｄｙ，Ｎｂ 元素的添加对纳米稀土永磁体磁性能的影响，获得了居里温度和矫顽力较高且剩磁温度系数为正的纳米交换耦合永磁体．The am orphous Nd8.16 Dy1Fe85.26 Nb1B4.58 ribbons have been fabricated by m eans ofm elt-spun overquenching. Microstructure investigation by XRDand TEM of the am orphousand crystalribbonsisreported.them agnetic propertiesand theirdepen- dence of tem perature were determ ined using vibrating sam ple m agnetom eter (VSM). The influence of annealing tem perature, tim e and addition ofDy, Nb on the m agnetic properties of nanostracture rare-earth perm anent m agnet has been also investigated. The nanostructure exchange-coupling perm anent m agnetw ith higher Curie tem peratue and higher coercivity and positive rem anence tem perature coefficient have been ob- tained.

关 键 词：纳米交换耦合 制备 居里温度 磁性能 稀土永磁体 

分 类 号：TM273[一般工业技术—材料科学与工程] O482.54[电气工程—电工理论与新技术]