Anisotropic Hot-Deformed MRE-Fe-B Magnets With Zn Powder Addition (MRE = Nd plus Y plus Dy)

作者：Tang W^*; Xing Q F; Dennis K W; Oster N T; Kramer M J; Anderson I E; McCallum R W

来源：IEEE Transactions on Magnetics, 2012, 48(11): 3147-3149.

DOI：10.1109/TMAG.2012.2205908

• Anisotropic magnet
• hot deformation
• magnetic properties
• rare earth magnet

Anisotropic magnets were fabricated by a vacuum hot deformation (VHD) method from isotropic MRE2(Fe, Co)(14)B ribbons mixed with Zn powder (MRE = Nd + Y = Dy). TEM microstructure shows that the VHD processing results in the formation of aligned platelet-like grains perpendicular to the pressing direction, and thus produces a strong magnetic anisotropy texture parallel to the pressing direction. The addition of Zn is helpful to develop higher magnetic anisotropy and retain better magnetic properties during the VHD processing. An optimized VHD magnet obtained a (BH)(max) of 23.3 MGOe compared to 9.6 MGOe for the isotropic ribbons. The temperature coefficients of M-r and H-c for the VHD sample are -0.09 and -0.48%/degrees C in the temperature range of 27-127 degrees C, respectively.

• 出版日期2012-11