Radially anisotropic ring/arc-shaped rare-earth bonded magnets using a self-organization technique

We developed a new technique using self-organization of binder that enabled the alignment of a molecular chain. By using this technique, we controlled the flexibility of Nd-Fe-B-based rigid sheet magnets, transformed them into various shapes, and succeeded in preparing radially anisotropic ringor arc-shaped magnets. Optimizations of the consolidation process of the self-organization binder under a transverse alignment field and the transformation process into various specific shapes realized radially anisotropic magnets with 160 [kJ/m.sup.3] in [(BH).sub.max.] Index Terms--Flexible bonded magnet, hydrogenation, disproportionation, desorption, and recombination (HDDR)-Nd-Fe-B powder, radially anisotropic magnet.