Pr_2(Fe,Co)_(14)B/α-(Fe,Co)纳米复合永磁合金的组织与磁性  

Microstructure and Magnetic Properties of Pr_2(FeCo)_(14)B/α-(FeCo) Nanaocomposite Permanent Alloys

作　　者：包小倩[1] 张茂才[1] 刘湘华[1] 乔祎[1] 高学绪[1] 周寿增[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：《北京科技大学学报》2002年第2期203-207,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助课题(No.10074005)

摘　　要：利用单辊快淬法制备了由硬磁相Ｐｒ２（Ｆｅ，Ｃｏ）１４Ｂ和软磁相α（Ｆｅ，ＣＯ），Ｐｒ２（Ｆｅ，Ｃｏ）１７组成的 纳米晶复合永磁材料．用Ｘ射线衍射、室温磁性能测量和热磁分析等，研究了Ｐｒ７．５Ｄｙ１Ｆｅ８０－ｘＣｏｘ Ｎｂ１Ｂ４．５（ｘ＝１０，１５）合金快淬带在不同温度下不同时间退火后的组织和磁性能变化规律．结果表 明，快淬带在７００℃退火６ｈ后，永磁性能仍保持较高的水平，说明同时添加Ｃｏ和Ｎｂ，有可能提 高纳米晶复合永磁合金的热稳定性．The nanocomposite permanent alloys which is composed of Pr2(Fe,Co)14B and α-(Fe,Co) and Pr2(Fe,Co)17 were made by single-roller rapid quenching. The X-ray diffraction method, room-temperature magnetic measurement and thermal magnetic analysis were used to analyze the microstructure and magnetic properties of Pr7.5Dy1Fe86-xCoxNb1B4.5(x=10,15) alloys. Magnetic properties of the ribbons annealing at different temperature and for various time were extensively studied. Permanent magnetic properties still keep a high level in the ribbons that were annealed at 700℃ for six hours. This result implies that thermal stability of the alloys may be enhanced by adding Co and Nb at the same time.

关 键 词：纳米复合永磁 合金 组织 磁性 交换耦合 剩磁增强 热稳定性 

分 类 号：TG132.2[一般工业技术—材料科学与工程]