Title :
Influence of milling conditions on magnetic properties of Sm2 Fe17N3 particles
Author :
Tajima, Shin ; Hattori, Takeshi ; Kato, Yoshio
Author_Institution :
Toyota CRDL, Aichi, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
Ball milling conditions were examined for the preparation of fine Sm2Fe17N3 particles. The milling process with high ball/bottle volume ratio produced Sm2Fe17N3 particles with low i Hc and 4 πIr. The decrease in 4 πIr and iHc were attributed to particle aggregates formed during the milling. The addition of a surfactant (e,g. polystearic acid) prevented aggregation in the ball milling, and yielded high-performance Sm2Fe17N3 particles (4 πIr: 14.1 kG, iHc: 9 kOe, (BW)max: 34 MGOe); cf. (BH)max=20 MGOe for typical epoxy-bonded magnets
Keywords :
composite materials; ferromagnetic materials; iron alloys; magnetic particles; permanent magnets; powder metallurgy; samarium alloys; Sm2Fe17N3; Sm2Fe17N3 particles; ball milling conditions; ball/bottle volume ratio; epoxy-bonded magnets; particle aggregates; polystearic acid surfactant; Annealing; Argon; Ball milling; Iron; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnets; Samarium; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
