公开(公告)号：US4834812A

公开(公告)日：1989-05-30

申请号：US115829

申请日：1987-11-02

Applicant: Mohammad H. Ghandehari

Inventor： Mohammad H. Ghandehari

IPC: B22F1/00 ,  C22C1/04 ,  H01F1/057

CPC classification number: C22C1/0441 ,  B22F1/0003 ,  H01F1/057 ,  H01F1/0577 ,  H01F1/0578

Abstract: Permanent magnets are prepared by a method comprising mixing a particulate rare earth-iron-boron alloy with a particulate additive metal powder, compacting the aligned mixture to form a shape, and heating the compacted shape at a temperature at least 150.degree. C. less than the sintering temperature of a rare earth-iron-boron alloy and usually in the range from about 700.degree. C. to less than 850.degree. C.

Abstract translation: 通过以下方法制备永久磁铁，该方法包括将稀土 - 铁 - 硼合金颗粒与颗粒状添加金属粉末混合，将对准的混合物压实成形状，并在至少150℃的温度下加热压实形状 稀土 - 铁 - 硼合金的烧结温度，通常在约700℃至低于850℃的范围内。

公开(公告)号：US4793874A

公开(公告)日：1988-12-27

申请号：US11609

申请日：1987-02-06

Applicant: Tetsuhiko Mizoguchi ,  Koichiro Inomata ,  Toru Higuchi ,  Isao Sakai

Inventor： Tetsuhiko Mizoguchi ,  Koichiro Inomata ,  Toru Higuchi ,  Isao Sakai

IPC: H01F1/04 ,  H01F1/057 ,  H01F1/02

CPC classification number: H01F1/057 ,  H01F1/0577

Abstract: A permanent magnetic alloy essentially consists of 10 to 40% by weight of R, 0.1 to 8% by weight of boron, 50 to 300 ppm by weight of oxygen and the balance of iron, where R is at least one component selected from the group consisting of yttrium and the rare-earth elements.An alloy having this composition has a high coercive force .sub.I H.sub.C and a high residual magnetic flux density and therefore has a high maximum energy product.

公开(公告)号：US20240355514A1

公开(公告)日：2024-10-24

申请号：US18760904

申请日：2024-07-01

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Wanfeng Li ,  Chuanbing Rong ,  Michael W. Degner

IPC: H01F1/057 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/00 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  H01F41/02

CPC classification number: H01F1/057 ,  B33Y70/00 ,  C22C38/005 ,  C22C38/06 ,  C22C38/105 ,  C22C38/12 ,  H01F41/0253 ,  B22F10/28 ,  B22F2301/355 ,  B33Y10/00 ,  C22C2202/02

Abstract: A permanent magnet formed by additively manufacturing magnetic phases and buffer phases is disclosed. The buffer phase(s) may improve performance, enhance mechanical properties and allow the magnet to better tolerate stresses such that defects such as cracking do not occur or are less likely to occur. The buffer phase may be a magnetic or non-magnetic material.

公开(公告)号：US20240339251A1

公开(公告)日：2024-10-10

申请号：US18546486

申请日：2022-01-17

Applicant: Fujian Golden Dragon Rare-Earth Co., Ltd

Inventor： ZHIHUI TANG ,  JIAYING HUANG ,  XING WEI ,  ZHIGANG LI ,  DEQIN XU ,  DAKUN CHEN

IPC: H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  B22F9/04 ,  C22C33/06 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16

CPC classification number: H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  C22C33/06 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2201/03 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

Abstract: The invention discloses a neodymium-iron-boron magnet and a preparation method thereof. The neodymium-iron-boron magnet comprises a main phase crystal grain, a shell layer of the main phase crystal grain and a Nd-rich phase adjacent to the main phase crystal grain, wherein the main phase crystal grain comprises Nd2Fe14B; or the main phase crystal grain comprises Nd2Fe14B and Pr2Fe14B; the shell layer comprises (Nd/Dy)2Fe14B and/or (Nd/Tb)2Fe14B; the shell layer has a thickness of 0.1-6 μm; the Nd-rich phase comprises a R6Fe13B phase, wherein the R is one or more selected from the group consisting of Nd, Pr, Dy and Tb. The method of the invention effectively reduces the diffusion amount of the heavy rare earth elements into the main phase, forms a thinner heavy rare earth shell layer, and can further optimize and improve the high temperature performance of the magnet.

公开(公告)号：US11967454B2

公开(公告)日：2024-04-23

申请号：US17385319

申请日：2021-07-26

Applicant: Abiomed Europe GmbH

Inventor： Thorsten Siess ,  Claudia Mourran

IPC: A61M60/13 ,  A61M60/135 ,  A61M60/216 ,  A61M60/416 ,  A61M60/419 ,  A61M60/422 ,  A61M60/825 ,  H01F7/02 ,  H01F41/02 ,  H01F1/055 ,  H01F1/057

CPC classification number: H01F41/026 ,  A61M60/13 ,  A61M60/135 ,  A61M60/216 ,  A61M60/416 ,  A61M60/419 ,  A61M60/422 ,  A61M60/825 ,  H01F7/02 ,  H01F7/0221 ,  F16C2316/18 ,  H01F1/0557 ,  H01F1/057

Abstract: This invention is directed to a corrosion resistant permanent magnet, to a method for producing a corrosion resistant permanent magnet, and to an intravascular blood pump comprising the magnet. The magnet is corrosion resistant due to a composite coating comprising a metal layer, optionally a metal oxide layer, a layer formed from poly(2-chloro-p-xylylene), and a linker layer between the metal oxide layer and the poly(2-chloro-p-xylylene) layer.

公开(公告)号：US11923133B2

公开(公告)日：2024-03-05

申请号：US17537917

申请日：2021-11-30

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Wanfeng Li ,  Franco Leonardi ,  Michael W. Degner

IPC: H01F7/02 ,  H01F1/057 ,  H01F41/02 ,  B33Y10/00 ,  B33Y40/20 ,  B22F10/28 ,  B22F10/60 ,  B33Y80/00

CPC classification number: H01F7/02 ,  B22F10/28 ,  B22F10/60 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  H01F1/057 ,  H01F41/0253 ,  B22F2301/45

Abstract: Permanent magnets and method of making the same are provided. The magnets include a magnetic layer having an insulation layer disposed thereon. The insulation layer is formed via additive manufacturing techniques such as laser melting such that that it has discrete phases including a magnetic phase and an insulating phase.

公开(公告)号：US11920236B2

公开(公告)日：2024-03-05

申请号：US17357296

申请日：2021-06-24

Applicant: SANVAC (BEIJING) MAGNETICS CO., LTD. ,  BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.

Inventor： Guoan Chen ,  Bin Fang ,  Haojie Wang ,  Yugang Zhao

IPC: B32B15/01 ,  C23C14/02 ,  C23C14/16 ,  C23C14/34 ,  H01F1/057 ,  H01F41/02

CPC classification number: C23C14/165 ,  B32B15/01 ,  C23C14/022 ,  C23C14/3464 ,  H01F1/057 ,  H01F41/0253 ,  B32B2307/208

Abstract: A composite coating layer for coating a NdFeB rare earth magnet includes a first coating layer and a second coating layer formed over a surface of the first coating layer. The first coating layer includes a Nd coating layer, a Pr coating layer, or an alloy coating layer including two or more of Nd, Pr, and Cu. The second coating layer includes a Tb coating layer.

公开(公告)号：US20240071666A1

公开(公告)日：2024-02-29

申请号：US18506227

申请日：2023-11-10

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Wanfeng Li ,  Franco Leonardi ,  Michael W. Degner

IPC: H01F7/02 ,  B22F10/28 ,  B22F10/60 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  H01F1/057 ,  H01F41/02

CPC classification number: H01F7/02 ,  B22F10/28 ,  B22F10/60 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  H01F1/057 ,  H01F41/0253 ,  B22F2301/45

Abstract: Permanent magnets and method of making the same are provided. The magnets include a magnetic layer having an insulation layer disposed thereon. The insulation layer is formed via additive manufacturing techniques such as laser melting such that that it has discrete phases including a magnetic phase and an insulating phase.

公开(公告)号：US11881755B2

公开(公告)日：2024-01-23

申请号：US17417579

申请日：2019-03-08

Applicant: NEODYMOTORS GMBH

Inventor： Paulo Eduardo De Sousa Pereira

IPC: H02K53/00 ,  H02K1/02 ,  H01F1/057 ,  H02K7/10 ,  H02K16/00

CPC classification number: H02K53/00 ,  H01F1/057 ,  H02K1/02 ,  H02K7/1004 ,  H02K16/005

Abstract: A power generation system which is mounted on at least one triangular shaped horizontal base on which is placed a cylindrical platform at the center, which is called a primary rotor, and a set of three cylindrical platforms, which are called secondary rotors, which surround the first rotor. The primary rotor and secondary rotors have a specific set of neodymium magnets and are fixed on vertical axis bearings mounted on the said horizontal base.

公开(公告)号：US20240001440A1

公开(公告)日：2024-01-04

申请号：US18075741

申请日：2022-12-06

Applicant: Hyundai Motor Company ,  Kia Corporation ,  Industry-University Cooperation Foundation Hanyang University ERICA Campus

Inventor： Bo Kyeong Han ,  Yong-Ho Choa ,  Saemee Yun ,  Jimin Lee ,  Byungkwon Jang

IPC: B22F1/142 ,  H01F1/057 ,  B22F9/04 ,  C01G49/00

CPC classification number: B22F1/142 ,  H01F1/057 ,  B22F9/04 ,  C01G49/009 ,  B22F2201/20

Abstract: Provided is a cleaning device for cleaning a magnet powder including: a flask provided to contain the magnet powder and a cleaning material used to clean the magnet powder; and a vacuum manifold provided to maintain the magnet powder and the cleaning material contained in the flask in an inert state during cleaning.
Provided is a method for cleaning a magnet powder including a loading operation for loading a magnet powder, a cleaning solution, and zeolite into a flask; a gas injecting operation for injecting an inert gas into the flask; and a vacuum drying operation for drying the magnet powder and the zeolite in a vacuum.
Provided is a method for manufacturing a magnet powder including: preparing a primary mixture by mixing neodymium (III) nitrate, boric acid, and iron (III) nitrate nonahydrate; preparing an oxide by heat-treating the primary mixture; removing a residual organic material of the oxide by heat-treating the oxide; preparing a hydrogen-reduced oxide by reacting the oxide, from which the residual organic material is removed, with hydrogen by heat treatment; preparing a secondary mixture by mixing the hydrogen-reduced oxide with calcium; obtaining a product by subjecting the secondary mixture to reduction-diffusion reaction by heat treatment; and obtaining Nd2Fe14B powder by pulverizing the product.