Soft anisotropic magnetic material article and method for its production

摘要

An article 2, or a method of making an article, comprises a polycrystalline soft magnetic material including grains with a common preferred orientation and a magnetic anisotropy. The said article 2 may be arranged such that during its use a difference in magnetic energy of ΔE between a mag­netic energy El in a first, easy magnetisation, direction 10 and a magnetic energy E2 in a second, more difficult magnetisation, direction 11 is at least 150 to 270 kJ/m3. The method may provide particles which are oriented to form a preferred texture soft magnetic anisotropic material or provide an amorphous, or nanocrystalline, material which is processed to induce a preferred texture soft magnetic anisotropic material. The article 2 or method may include sintering, a polymer matrix. The magnetic material may have axial and/or planar anisotropic properties. The magnetic material may include rare earth elements, particles or alloys. The article 2 or method may be used in forming a reluctance motor 1 rotor arrangement.