| 摘要 |
PURPOSE:To improve a coercive force by forming surfaces of magnet particles containing N in alloyed particles of Sm2(Fe, Co)17 series in specific smoothness. CONSTITUTION:This magnet particles contain a composition containing 5-15 atomic % of R (R is one or more types of rare earth elements and contains Sm as an indispensable element), 0.5-25 atomic % of N and the residue T (T is Fe or Fe and Co). The particles contain 30% or less of smoothness SS on each segment represented by the smoothness SS=(DELTA1-12=(gammamax-gammamin) 1-12)/LX100, where a flat surface is divided into twelve segments by 30 degrees with the center of gravity of an arbitrary section of the particles as a center to form the twelve segments, gamma is a distance from the center of gravity to the surface of each segment, DELTAgamma is a difference of the maximum value gammamax and the minimum value gammamin in each segment, and L is the longest diameter of the sectional shape of the particle. A resin bonded magnet using the magnet particles in which the surfaces are smoothed can obtain high magnetic properties. |
