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. 30, 2021
Filed:
Mar. 27, 2018
Tdk Corporation, Tokyo, JP;
Takuma Hayakawa, Tokyo, JP;
Makoto Iwasaki, Tokyo, JP;
Tetsuya Hidaka, Tokyo, JP;
Eiji Kato, Tokyo, JP;
Hidetake Kitaoka, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
Provided is an alloy for R-T-B based rare earth magnet. 'R' is one or more of a rare earth element, 'T' is one or more of a transition metal element essentially including Fe or Fe and Co, and 'B' is boron. The alloy includes a single or a plural number of main phase (A), having a minimum length of 10 μm or more and a maximum length of 30 μm or more and 300 μm or less, in a cross section cut along a thickness direction of the alloy. The main phase (A) includes an RTB phase, and an area ratio of the main phase (A) to an entire cross section is 2% or more and 60% or less.