| 摘要 |
PURPOSE:To obtain permanent magnet powder having stabilized and excellent magnetic anisotropy and corrosion-resisting property without performing a hot plastic processing by a method wherein a kind selected from Ti, V, Nb, Ta, Al and Si of specific quantity is contained in the title permanent magnet powder, and also specific recrystallized texture, having R2Fe14B type phase as the main phase, is given to the permanent magnet powder. CONSTITUTION:The title magnet powder contains R-Fe-B permanent magnet powder mainly composed of at least a kind (R), selected from R-containing rare-earth elements, Fe and B in atomic percentage of 10 to 20% for R, 3 to 20% for B and 1 to 5.0% in total for one or more kinds of Ti, V, Nb, Ta, Al and Si, the remainder consisting of Fe and inevitable impurities and a recrystallized texture consisting of recrystallized particles of B-type intermetallic compound of tetragonal structure. The above- mentioned recrystallized texture contains 50 volume % or more of the entire recrystallized particles having the value 2 or smaller of ratio b/a of the shortest particle diameter (a) and the longest particle diameter (b), and the average particle diameter of the recrystallized particles constituting the above-mentioned recrystallized texture is 0.05 to 20mum. |
