| 摘要 |
PROBLEM TO BE SOLVED: To provide an Nd-Fe-B rare-earth-based permanent magnet by manufacturing a nano-composite structure having magnetic anisotropy by using a novel method which is different from the conventional methods. SOLUTION: A rare-earth permanent magnet is composed of Nd, Fe, and B and the main phase of the magnet is composed of Nd2 Fe14 , with the B-phase Fe, an alloy containing Fe, or an intermetallic compound of the magnet being composed of a finely dispersed texture. The Nd2 Fe14 main phase and B phase having magnetic anisotropy and the finely dispersed structure are obtained by dispersing the B-element in the Nd2 Fe14 intermetallic compound. Then the mixed powder of Nd2 Fe14 intermetallic compound, B, B2 , O3 , or boric acid, and a Ca metal is heat-treated by a reductive diffusion method. |
