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

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.