Texture Induced Magnetic Anisotropy in Fe–Nd–B Magnets Prepared via Rapid Solidification and Hot Extrusion Techniques

Abstract

High performance Fe–Nd–B magnets were prepared by consolidation of rapidly solidified melt spun powder using a hot extrusion technique. The extrusion was carried out with various die openings to control the distribution of stresses and strains influencing the possible development of texture. A strong anisotropy in magnetic properties has been found in the extruded magnets. The highest remanence of 10.6 kG and the maximum energy product of 16.6 MGOe were achieved along the through-thickness direction of the magnet extruded into a rectangular cross section. A (001) [1¯20] texture was found to develop in the plane normal to the through-thickness direction. It is suggested that the enhanced remanent magnetization arises principally from the formation of favorable texture.