合金成分对Pr_2Fe_(14)B/α-Fe纳米复合永磁材料组织与磁性的影响  

Influence of compositions on microstructure and magnetic properties of nanocomposite Pr_2Fe_(14)B/α-Fe permanent alloys

作　　者：包小倩[1] 周寿增[1] 王佐诚[1] 张茂才[1] 乔祎[1] 刘湘华[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《中国有色金属学报》2003年第2期414-418,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(10074005)

摘　　要：用XRD、TEM、Mossbauer谱和VSM等实验方法,研究了不同Pr含量、B含量和Cu含量的Pr2Fe14B/α Fe型纳米复合快淬带的显微结构与磁性。结果表明:PrxFe94-xB6合金在x=8(α Fe体积分数约30%)时磁性能最佳,Br=1.29T,Hci=461.7kA/m,(BH)max=165.6kJ/m3;Pr8.5(Fe0.8Co0.2)86.5-xCuxB5合金在x=0.5时获得最佳的磁性能;随B含量增加,富B相在晶界分布,Pr8Fe92-xBx交换耦合减弱,磁性能单调下降。Microstructure and magnetic properties of nanocomposite Pr2Fe14B/αFe ribbons with different Pr, B and Cu contents, prepared by meltspinning or subsequent annealing were investigated by the methods of XRD, TEM, Mossbauer and VSM. As a result, the excellent magnetic properties with Br=1.29 T, Hci=461.7 kA/m, (BH)max =165.6 kJ/m3 are obtained in PrxFe94-xB6 ribbons with x=8. High performance is also achieved in Pr8.5(Fe0.8Co0.2)86.5-xCuxB5 ribbons with x=0.5. As the content of B in Pr8Fe92-xBx ribbons increases, the distribution of Brich phases at intergranular regions results in the weakening of exchange coupling and the decreasing of magnetic properties.

关 键 词：纳米复合水磁 熔体快淬 磁性能 永磁材料 合金成分 显微结构 

分 类 号：TM273[一般工业技术—材料科学与工程]