발간논문

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Vol.30, No.10, 1211 ~ 1218, 1992
Title
The Magnetic Properties of Rapidly Solidified Powders , Hot Pressed and Die Upset Magnet of Nd - Fe - B Alloy
최철진Chul Jin Choi, 한유동Yoo Dong Hahn, 박원욱Won Wook Park
Abstract
The magnetic properties of rapidly solidified powders, hot pressed and die upset bulk magnet of Nd-Fe-B base alloy were investigated. Rapidly solidified powders were manufactured by crushing the melt spun ribbons. The effects of melt spinning condition on the magnetic properties of powders were evaluated. Hot pressing was adopted to consolidate rapidly solidified powders. Fully dense isotropic magnets were produced at the compacting temperature higher than 720℃. The best magnetic properties were obtained in the hot pressed magnet at the compacting temperature of 750℃ within the studied range. The effect of hot pressing time on the magnetic properties was insignificant. Die upset magnet showed a magnetic anisotropy due to the alignment of C axis in Nd₂Fe_(14) crystal parallel to the die upsetting direction.
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