The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2020
Filed:
Oct. 31, 2013
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Yosuke Horiuchi, Tokyo, JP;
Shinya Sakurada, Tokyo, JP;
Keiko Okamoto, Kanagawa-ken, JP;
Masaya Hagiwara, Kanagawa-ken, JP;
Tsuyoshi Kobayashi, Kanagawa-ken, JP;
Masaki Endo, Tokyo, JP;
Tadahiko Kobayashi, Kanagawa-ken, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
In one embodiment, a permanent magnet includes a sintered compact including: a composition expressed by a composition formula: RFeMCuCo(R is at least one element selected from rare-earth elements, M is at least one element selected from Zr, Ti, and Hf, 10≤p≤13.3 at %, 25≤q≤40 at %, 0.87≤r≤5.4 at %, and 3.5≤s≤13.5 at %); and a metallic structure having a main phase including a ThZncrystal phase, and an R-M-rich phase containing the element R whose concentration is 1.2 times or more an R concentration in the main phase and the element M whose concentration is 1.2 times or more an M concentration in the main phase. A volume fraction of the R-M-rich phase in the metallic structure is from 0.2% to 15%.