RE2Fe14B/α-Fe(RE=Nd,Dy,Pr)纳米复合永磁材料的研究

Research on RE2Fe14B/α-Fe(RE=Nd, Dy, Pr)Nanocomposite Magnets

摘要:

随着稀土含量的增加,快淬薄带矫顽力提高,剩磁降低,当稀土总量为10at%和快淬速度为12 m/s时,快淬薄带的矫顽力可达955 kA/m.当稀土总量为9.5at%时,快淬薄带晶化后的磁性能几乎不受快淬速度的影响.Dy替代部分Nd,提高了快淬薄带的非晶形成能力和热稳定性;经过晶化处理后,快淬薄带的矫顽力明显提高,剩磁略有下降,居里温度提高.Pr替代部分Nd,也提高了快淬薄带的非晶形成能力和热稳定性:经过晶化处理后,快淬薄带的剩磁和矫顽力都有所增加.

Abstract:

Coercivity is improved, while remanence is decreased for the annealed ribbons with the increase of rare earth content, the coercivity for ribbons reaches 955 kA/m upon 10at% in rare earth content and 12 m/s in wheel speed. Wheel speed almost has no effect on magnetic properties of ribbons with 9,5at% in rare earth. The amorphous formation ability and thermal stability are improved for as-spun ribbons upon Dy or Pr substitution for Nd element. Coercivity and Curie temperature are improved and remanence is decreased slightly for ribbons upon Dy substitution for Nd element. But for ribbons with Pr substitution for Nd element, both of coercivity and remanence are increased slightly .