Magnet and bonded magnet

Details Magnet and bonded magnet Magnet and bonded magnet

1995-07-11

1998-05-12

Sheehan, John

Compositions

Magnetic

With wax, bitumen, resin, or gum

148301, 420 83, 420128, 420581, C04B 3504

Patent

active

057500444

ABSTRACT:
A magnet consists essentially of 4-8 at % of R, 10-20 at % of N, 2-10 at % of M, and the balance of T wherein R is at least one rare earth element, Sm being present in R in a proportion of at least 50 at %, T is Fe or Fe and Co, M is Zr with or without partial replacement by at least one element of Ti, V, Cr, Nb, Hf, Ta, Mo, W, Al, C, and P. Contained in the magnet are a hard magnetic phase based on R, T, and N and containing at least one crystalline phase selected from TbCu.sub.7, Th.sub.2 Zn.sub.17, and Th.sub.2 Ni.sub.17 types and a soft magnetic phase consisting of a T phase having a bcc structure, the soft magnetic phase having a mean grain size of 5-60 nm and being present in a proportion of 10-60% by volume. This construction ensures high coercivity, high squareness ratio, and high maximum energy product.

REFERENCES:
patent: 5022939 (1991-06-01), Yajima et al.
patent: 5049208 (1991-09-01), Yajima et al.
patent: 5186766 (1993-02-01), Iriyama et al.
patent: 5209789 (1993-05-01), Yoneyama et al.
patent: 5309977 (1994-05-01), Yoneyama et al.
patent: 5480495 (1996-01-01), Sakurada et al.
patent: 5549766 (1996-08-01), Tsutai et al.
Journal of Magnetism and Magnetic Materials, vol. 124, pp. 1-4, 1993, J. Ding, et al., "Remanence Enhancement in Mechanically Alloyed Isotropic Sm7Fe93-Nitride".
Proceedings of the Eleventh International Workshop on Rare-Earth Magnets and Their Applications, vol. 2, pp. 35-60, Oct. 1990, J.M.D. Coey, et al. "A New Family of Rare Earth Iron Nitrides".

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