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:
Sep. 08, 2020
Filed:
Mar. 18, 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
A high performance permanent magnet is provided. The permanent magnet includes a composition represented by a composition formula: RFeMCuCo, and a metallic structure including cell phases having a ThZncrystal phase and Cu-rich phases having higher Cu concentration than the cell phases. An average diameter of the cell phases is 220 nm or less, and in a numeric value range from a minimum diameter to a maximum diameter of the cell phases, a ratio of a number of cell phases having a diameter in a numeric value range of less than upper 20% from the maximum diameter is 20% or less of all the cell phases.