Title:
MAGNET MATERIAL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3715573
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a magnet which contains hyperfine crystal grains, and has a high residual magnetic flux density, and a sufficient maximum magnetic energy product.
SOLUTION: The magnet material is substantially expressed by the general formula of Rx (T1-u-v-wCuuM1vM2w)1-x-yAy (wherein, R is at least one kind of element selected from rare earth elements inclusive of Y; T is Fe or Co; M1 is at least one kind of element selected from Zr, Ti, Nb, Mo, Ta, W, and Hf; M2 is at least one kind of element selected from Cr, V, Mn, and Ni; A is at least one kind of element selected from N and B; and x, y, u, v, and w are atomic ratios, respectively, and satisfy 0.04≤x≤0.2, 0.001≤y≤0.2, 002≤u≤0.2, 0≤v≤0.2, and 0≤w≤0.2), and contains a 0.2 to 10 vol.% non- magnetic phase containing ≥20 atomic % Cu, and a hard magnetic main phase, and in which the mean crystal grain size of the hard magnetic main phase is ≤100 nm.
Inventors:
Ume Takeshi
Shinya Sakurada
Shinya Sakurada
Application Number:
JP2001400599A
Publication Date:
November 09, 2005
Filing Date:
December 28, 2001
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
B22F1/00; B22F9/04; C22C38/00; C22C38/52; H01F1/053; H01F1/06; (IPC1-7): C22C38/00; B22F1/00; B22F9/04; H01F1/053
Domestic Patent References:
| JP10088295A | ||||
| JP2000353612A | ||||
| JP2000353611A | ||||
| JP2000114020A |
Attorney, Agent or Firm:
Mitsuyuki Matsuyama