| 摘要 |
PURPOSE:To elevate a Curie point of a magnet material, and to improve temperature characteristics by replacing one part of Fe as the principal ingredient of a Fe.B.R group magnet with Co. CONSTITUTION:Alloy powder of 0.3-80mum mean grain size consisting of R (where R is rare-earth elements containing Y) of 8-30% as an atomic percent, B of 2-28%, Co of 50% or less and the remainder and inevitable impurities is molded, sintered at a temperature of 900-1,200 deg.C under a reducing or a nonoxidizable atmosphere, and thermally treated at a temperature from 350 deg.C to said sintering temperature after sintering. When one part of Fe.B.R group Fe is replaced with Co, a Curie point rises, and not only excellent temperature characteristics are given but also corrosion resistance can be improved. |
