GB201121579D0 - Method for producing a rare earth-based magnet - Google Patents

Method for producing a rare earth-based magnet

Info

Publication number
GB201121579D0
GB201121579D0 GBGB1121579.5A GB201121579A GB201121579D0 GB 201121579 D0 GB201121579 D0 GB 201121579D0 GB 201121579 A GB201121579 A GB 201121579A GB 201121579 D0 GB201121579 D0 GB 201121579D0
Authority
GB
United Kingdom
Prior art keywords
rare earth
particles
magnets
further material
earth element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GBGB1121579.5A
Other versions
GB2497573A (en
GB2497573B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Priority to GB1121579.5A priority Critical patent/GB2497573B/en
Publication of GB201121579D0 publication Critical patent/GB201121579D0/en
Priority to DE102012111902.3A priority patent/DE102012111902B4/en
Publication of GB2497573A publication Critical patent/GB2497573A/en
Application granted granted Critical
Publication of GB2497573B publication Critical patent/GB2497573B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets

Abstract

A method of diffusing a rare earth element into a plurality of sintered magnets 4 which comprises a R2Fe14B phase (where R is a rare earth element). Particles 1 comprising a rare earth element R' are applied to a surface 3 of each magnet 4 and particles 2 of further material are also applied to a surface 9 of each magnet 4 . The magnets 4 are arranged such that particles 1 comprising R and particles 2 of the further material are positioned between adjacent magnets 4 â and then the magnets 4 heat treated at a temperature and for a time selected to allow diffusion of R' into adjacent magnets 4 while the further material remains solid and particulate. The particles 1 containing R can be a hydride, an alloy or a hydrogenated alloy and the further material can be a rare earth oxide. The particles 1 & 2 can be applied as a mixed paste (Fig. 1) or as separate pastes (Fig. 4).
GB1121579.5A 2011-12-15 2011-12-15 Method for producing a rare earth-based magnet Active GB2497573B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1121579.5A GB2497573B (en) 2011-12-15 2011-12-15 Method for producing a rare earth-based magnet
DE102012111902.3A DE102012111902B4 (en) 2011-12-15 2012-12-06 Method of making a rare earth based magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1121579.5A GB2497573B (en) 2011-12-15 2011-12-15 Method for producing a rare earth-based magnet

Publications (3)

Publication Number Publication Date
GB201121579D0 true GB201121579D0 (en) 2012-01-25
GB2497573A GB2497573A (en) 2013-06-19
GB2497573B GB2497573B (en) 2016-07-13

Family

ID=45560514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1121579.5A Active GB2497573B (en) 2011-12-15 2011-12-15 Method for producing a rare earth-based magnet

Country Status (2)

Country Link
DE (1) DE102012111902B4 (en)
GB (1) GB2497573B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105051844A (en) * 2013-03-18 2015-11-11 因太金属株式会社 RFeB-based sintered magnet production method and RFeB-based sintered magnets
EP2977999A4 (en) 2013-03-18 2016-03-16 Intermetallics Co Ltd RFeB-BASED MAGNET PRODUCTION METHOD AND RFeB-BASED SINTERED MAGNETS
GB2515019B (en) * 2013-06-10 2016-08-17 Vacuumschmelze Gmbh & Co Kg Method for producing a rare earth-based magnet
JP6331317B2 (en) * 2013-10-04 2018-05-30 大同特殊鋼株式会社 Coupled RFeB magnet and method for manufacturing the same
CN105234386B (en) * 2015-06-08 2017-04-19 中铝广西有色金源稀土股份有限公司 Method for preparing sintered neodymium iron boron through grain boundary diffusion of heavy rare earth
GB2540150B (en) 2015-07-06 2020-01-08 Dyson Technology Ltd Rare earth magnet with Dysprosium treatment
GB2540149B (en) * 2015-07-06 2019-10-02 Dyson Technology Ltd Magnet
JP7020051B2 (en) * 2017-10-18 2022-02-16 Tdk株式会社 Magnet joint
CN108950503B (en) * 2018-07-30 2020-03-31 山西金山磁材有限公司 Sintered neodymium iron boron coating film and vacuum coating process thereof
JP7287314B2 (en) * 2020-03-03 2023-06-06 Tdk株式会社 magnet structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08176887A (en) * 1994-12-22 1996-07-09 Tokin Corp Manufacture of rare earth permanent magnet excellent in oxidation resistance and device therefor
US8211327B2 (en) * 2004-10-19 2012-07-03 Shin-Etsu Chemical Co., Ltd. Preparation of rare earth permanent magnet material
JP4788427B2 (en) * 2006-03-23 2011-10-05 日立金属株式会社 R-Fe-B rare earth sintered magnet and method for producing the same
US8420160B2 (en) * 2006-09-15 2013-04-16 Intermetallics Co., Ltd. Method for producing sintered NdFeB magnet
MY174972A (en) * 2011-05-02 2020-05-29 Shinetsu Chemical Co Rare earth permanent magnets and their preparation

Also Published As

Publication number Publication date
GB2497573A (en) 2013-06-19
DE102012111902A1 (en) 2013-06-20
GB2497573B (en) 2016-07-13
DE102012111902B4 (en) 2020-02-06

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