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.