Permanent magnet

Abstract

Abstract PURPOSE:To increase the coercive force of a permanent magnet, by adding to an Fe-B-R alloy an additive element such as Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr and Hf. CONSTITUTION:A magnetic anisotropic sintered permanent magnet is formed from, by atomic percentage, 8-30% R (wherein R is at least one of earth elements including Y), 2-28% B, a predetermined percentage of one or more of additive elements M and the balance Fe. Escamples of the additive elements M are as follows: 4.5% or less Ti, 4.5% or less Ni, 5% or less Bi, 9.5% or less V, 12.5% or less Nb, 10.5% or less Ta, 8.5% or less Cr, 9.5% or less Mo, 9.5% or less W, 3.5% or less Mn, 9.5% or less Al, 2.5% or less Sb, 7% or less Ge, 3.5% or less Sn, 5.5% or less Zr and 5.5% or less Hf.

Inventors

• 👤 Masato Sagawa
• 👤 眞人 佐川
• 👤 Setsuo Fujimura
• 👤 藤村　節夫
• 👤 Yutaka Matsuura
• 👤 裕 松浦

Bibliographic Details