| 摘要 |
PURPOSE:To obtain a rare earth element-iron type permanent magnet having high coercive force and (BH)max., stably, by using a permanent magnet alloy obtd. by blending iron with specified amounts of a rare earth element, boron, silver and oxygen. CONSTITUTION:The composition of a permanent magnet alloy is composed of, by weight, 10-40% R (R is at least one kind of rare earth element selected among Y, Nd and Pr), 0.1-8% boron, 0.5-5% silver, 0.005-0.03% oxygen and the balance iron with inevitable impurities. Cobalt may be substituted for 5-20wt% of the iron. |
