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:
May. 12, 2020
Filed:
Mar. 03, 2015
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Yosuke Horiuchi, Tokyo, JP;
Shinya Sakurada, Tokyo, JP;
Keiko Okamoto, Kanagawa, JP;
Masaya Hagiwara, Kanagawa, JP;
Tsuyoshi Kobayashi, Kanagawa, JP;
Masaki Endo, Tokyo, JP;
Tadahiko Kobayashi, Kanagawa, JP;
Naoyuki Sanada, Kanagawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
The invention provides a high-performance permanent magnet. The permanent magnet has a composition that is expressed by a composition formula RFeMCuCo, where R is at least one element selected from a rare earth element, M is at least one element selected from the group consisting of Zr, Ti, and Hf, p is a number satisfying 10.8≤p≤12.5 atomic percent, q is a number satisfying 25≤q≤40 atomic percent, r is a number satisfying 0.88≤r≤4.5 atomic percent, and t is a number satisfying 3.5≤t≤13.5 atomic percent. The permanent magnet also has a metallic structure that includes a main phase having a ThZncrystal phase, and a Cu-M rich phase having a higher Cu concentration and a higher M concentration than the main phase.