Gesinterter Seltenerdmagnet

Details

Veröffentlichungs-Nr.

EP4730367

Anmeldetag

11. Juni 2024

Veröffentlichung

19. Dezember 2024

Rechtsraum

EP

IPC

H01F1/057, B22F3/00, C22C38/00

Abstract

The present invention provides a rare earth sintered magnet which is characterized by satisfying the relational expression (1): [RGB] = [R] - [Fe]/7, the relational expression (2): [M1] = [Co] + [Cu] + [Ga], the relational expression (3): 1.0 < [RGB]/[M1] < 2.4, and the relational expression (4): [Cu] + [Ga] ≥ 0.28, where [R], [Fe], [Co], [Cu], [Ga], and [M1] are the respective atomic percentages of R (one or more rare earth elements essentially including Nd), Fe, Co, Cu, Ga, and M1 (two or more elements selected from among Co, Cu, and Ga, and essentially including Co), and [RGB] is the atomic percentage of R contributing to the formation of the grain boundary phase, in an arbitrary region within the depth range of 0.1-200 µm from the surface of the magnet. As a result, a rare earth sintered magnet which has high magnetic characteristics and excellent corrosion resistance can be obtained.

Anmelder

Firma

SHIN-ETSU CHEMICAL CO., LTD.

Land

🇯🇵 Japan