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 having a composition expressed by a composition formula: Rp1Feq1Mr1Cus1Co100-p1-q1-r1-s1 (R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10≤p1≤13.3 at %, 25≤q1≤40.0 at %, 0.88≤r1≤5.4 at %, and 3.5≤s1≤13.5 at %). The sintered compact includes crystal grains and a Cu-rich phase. The crystal grains are composed of a main phase including a ThZncrystal phase. The Cu-rich phase has a composition with a high Cu concentration and an average thickness of 0.05 μm or more and 2 μm or less.