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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.:

US 11459645 B1

PDFFull Text
Date of Patent:
Oct. 04, 2022

Filed:

Jul. 07, 2020

Plurality of flaky magnetic metal particles, pressed powder material, and rotating electric machine

Applicant:

Kabushiki Kaisha Toshiba, Tokyo, JP;

Inventors:

Tomohiro Suetsuna, Kawasaki Kanagawa, JP;

Hiroaki Kinouchi, Tokyo, JP;

Takahiro Kawamoto, Kawasaki Kanagawa, JP;

Assignee:

KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;

Attorney:

Amin, Turocy & Watson, LLP

Primary Examiner:

Kevin M Bernatz

Int. Cl.
CPC ...
H01F 1/24 (2006.01); H02K 1/02 (2006.01); C22C 38/10 (2006.01); C21D 9/52 (2006.01); C21D 8/02 (2006.01); C21D 6/00 (2006.01); B22F 9/04 (2006.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01); C22C 38/02 (2006.01); H02K 15/00 (2006.01); H01F 41/02 (2006.01); H01F 1/26 (2006.01);
U.S. Cl.
CPC ...
C22C 38/10 (2013.01); B22F 3/02 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0247 (2013.01); C21D 9/52 (2013.01); C22C 38/02 (2013.01); H01F 1/24 (2013.01); H01F 41/0246 (2013.01); H02K 1/02 (2013.01); H02K 15/00 (2013.01); B22F 2003/248 (2013.01); B22F 2009/043 (2013.01); B22F 2009/048 (2013.01); B22F 2202/05 (2013.01); B22F 2301/35 (2013.01); H01F 1/26 (2013.01);
Abstract

Provided is a plurality of flaky magnetic metal particles of the embodiments, each flaky magnetic metal particle having a flat surface provided with either or both of a plurality of concavities and a plurality of convexities arranged in a first direction, each concavity or convexity having a width of 0.1 μm or more, a length of 1 μm or more, and an aspect ratio of 2 or higher; and at least one first element selected from the group consisting of iron (Fe), cobalt (Co), and nickel (Ni), the flaky magnetic metal particles having an average thickness of between 10 nm and 100 μm inclusive and an average aspect ratio of between 5 and 10,000 inclusive.

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