Anisotropic Nanocrystalline SmCo5 Permanent Magnet Prepared by Hot Extrusion

A novel hot extrusion method to fabricate anisotropic nanocrystalline SmCo ₅ magnet was investigated. The results indicate that the hot-extruded (HE) SmCo ₅ magnet obtains a strong $c$ -axis texture in perpendicular to the extrusion direction, but the texture strength is clearly different in different regions. The deformation degree plays a key role in the formation of $c$ -axis crystallographic texture and magnetic anisotropy. In surface region of the HE magnet, the deformation degree of grains is the biggest, and the $c$ -axis texture and remanence are the strongest. Furthermore, deformation mechanism of the HE SmCo ₅ magnet was preliminarily discussed.