Nd_2(Fe,Al)_(14)B/α-Fe纳米复相永磁体的显微结构和磁性能  

MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Nd_2(Fe,Al)_(14) B/α-Fe NANO-COMPOSITE PERMANENT MAGNET

作　　者：王东玲[1] 赵韦人[2] 祝景汉[1] 

机构地区：[1]安泰科技股份有限公司,北京100081 [2]钢铁研究总院,北京100081

出　　处：《粉末冶金工业》2002年第1期11-16,共6页Powder Metallurgy Industry

摘　　要：本文研究了不同铝含量对Nd2 (Fe,Al) 14 B/α Fe纳米复相永磁材料显微结构和磁性能的影响。采用熔体快淬的方法制备实验样品 ,利用透射电镜观察铝对淬火态及不同热处理温度下样品组织结构和磁性能的影响。结果表明 ,在相同工艺下 ,铝的加入有利于快淬薄带非晶化 ,并将Nd2 Fe14 B相的析出温度向高温方向推移。同时 ,铝对合金的晶粒生长具有抑制作用 ,即细化晶粒。这种作用优化样品的组织结构 。The effects of Al Content on microstructure and magnetic properties of Nd 2(Fe,Al) 14 B/α Fe nanocomposite permanent magnets are discussed in this paper.Samples are prepared by melting spinning process.The effects of Al on the structure and magnetic properties of the samples,either in as spun status or then annealed under different temperatures,were observed and analyzed with TEM.It is shown that the amorphous degree is enhanced and the crystallization temperature of the Nd 2Fe 14 B moves to higher temperature with the increasing of Al.Moreover,Al can suppress the growth of the grain,thus reducing the crystallization grain size,which helps to optimize the microstructure and improve B r and (BH) max .

关 键 词：显微结构 磁性能 纳米复相永磁材料 交换耦合 晶化处理 

分 类 号：TG132.27[一般工业技术—材料科学与工程]