Method for enhancing coercivity of Nd-Fe-B based magnetic material

摘要

To provide a method of manufacturing a Nd-Fe alloy which has high utilization efficiency of heavy rare-earth material, high purity of heavy rare-earth film layer, high deposition rate, suitable for mass production and greatly enhances coercive force of heat--B system magnetic material according to the present invention.SOLUTION: The Nd-Fe-B based magnetic material flakes are placed in an argon gas protective container, the dysprosium, terbium or dysprosium-terbium alloy powder is uniformly dispersed on the surface of the Nd-Fe-B based magnetic material, , The powder on the surface of the Nd-Fe-B magnetic material is rapidly heated and cured and deposited, the magnetic material is put into a vacuum furnace and heat treated to diffuse the heavy rare earth element into the magnetic material along the grain boundary , The coercive force is increased without lowering the residual magnetic flux density.Selection drawing None