Fine grained anisotropic powder from melt-spun ribbons

摘要

A method is disclosed for producing a rapidly solidified, fine grained, magnetically anisotropic powder of the RE-Fe-B type. The rapidly solidified material is optimally quenched or slightly overquenched and is subjected to a hydrogen absorption-hydrogen desorption process that produces a fine grained material containing the essential magnetic phase RE2TM14B and an intergranular phase and is magnetically anisotropic.