公开(公告)号：US20230066150A1

公开(公告)日：2023-03-02

申请号：US17797976

申请日：2020-02-06

Applicant: LG ELECTRONICS INC. ,  NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Sunyong SONG ,  Seok NAMKUNG ,  Xin TANG ,  Hossein SEPEHRIAMIN ,  Tadakatsu OHKUBO ,  Kazuhiro HONO ,  Jiangnan LI

IPC: H01F1/057

Abstract: A rare-earth magnet according to an embodiment of the present invention comprises: a rare-earth magnet precursor including a composition of (R1(1-x)R2x)yFe(100-y-z-v-w)CozBvTMlw in which R1 comprises at least one of Nd or Pr, and R2 comprises Ce; and a diffusion metal including a composition of (LRE(100-p-q)HREp)TM2q, and diffused on the surface of the rare-earth magnet precursor, wherein the LRE in the diffusion metal can comprise light rare earth including Y, and the HRE can comprise heavy rare earth.

公开(公告)号：US20250054664A1

公开(公告)日：2025-02-13

申请号：US18718520

申请日：2022-12-12

Applicant: National Institute for Materials Science

Inventor： Xin TANG ,  Hossein SEPEHRI AMIN ,  Tadakatsu OHKUBO ,  Kazuhiro HONO

IPC: H01F1/057 ,  C22C38/00 ,  C22C38/10 ,  H02K1/02

Abstract: This hot-deformed R—Fe—B magnet for a variable-magnetic-force motor is an R2—Fe14—B (R is at least one rare earth element selected from among Nd, La, Ce, and Y)-based hot-deformed magnet, including, in atom %, 12.2% or more and 14.5% or less of R2(Nd1-x-y-zLaxCeyYz), where (0.0≤x≤0.2, 0.0≤y+z≤0.3), 5% or more and 6.5% or less of B, 0.0% or more and 5.0 or less of Co, and 0.0% or more and 1.0 or less of Ga, with the balance being made up of Fe and inevitable impurities.