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:
Nov. 14, 2017
Filed:
Dec. 27, 2012
Hidefumi Kishimoto, Susono, JP;
Noritsugu Sakuma, Susono, JP;
Masao Yano, Sunto-gun, JP;
Weibin Cui, Tsukuba, JP;
Yukiko Takahashi, Tsukuba, JP;
Kazuhiro Hono, Tsukuba, JP;
Hidefumi Kishimoto, Susono, JP;
Noritsugu Sakuma, Susono, JP;
Masao Yano, Sunto-gun, JP;
Weibin Cui, Tsukuba, JP;
Yukiko Takahashi, Tsukuba, JP;
Kazuhiro Hono, Tsukuba, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba, JP;
Abstract
The invention provides a nanocomposite magnet, which has achieved high coercive force and high residual magnetization. The magnet is a non-ferromagnetic phase that is intercalated between a hard magnetic phase with a rare-earth magnet composition and a soft magnetic phase, wherein the non-ferromagnetic phase reacts with neither the hard nor soft magnetic phase. A hard magnetic phase contains NdFeB, a soft magnetic phase contains Fe or FeCo, and a non-ferromagnetic phase contains Ta. The thickness of the non-ferromagnetic phase containing Ta is 5 nm or less, and the thickness of the soft magnetic phase containing Fe or FeCo is 20 nm or less. Nd, or Pr, or an alloy of Nd and any one of Cu, Ag, Al, Ga, and Pr, or an alloy of Pr and any one of Cu, Ag, Al, and Ga is diffused into a grain boundary phase of the hard magnetic phase of NdFeB.