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EP0125752A3 - Bonded rare earth-iron magnets - Google Patents

Bonded rare earth-iron magnets Download PDF

Info

Publication number
EP0125752A3
EP0125752A3 EP84301453A EP84301453A EP0125752A3 EP 0125752 A3 EP0125752 A3 EP 0125752A3 EP 84301453 A EP84301453 A EP 84301453A EP 84301453 A EP84301453 A EP 84301453A EP 0125752 A3 EP0125752 A3 EP 0125752A3
Authority
EP
European Patent Office
Prior art keywords
rare earth
bonded rare
iron magnets
magnets
iron
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
EP84301453A
Other versions
EP0125752B1 (en
EP0125752A2 (en
Inventor
Robert Weir Lee
John Joseph Croat
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.)
Magnequench International LLC
Original Assignee
General Motors Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23956982&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0125752(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by General Motors Corp filed Critical General Motors Corp
Publication of EP0125752A2 publication Critical patent/EP0125752A2/en
Publication of EP0125752A3 publication Critical patent/EP0125752A3/en
Application granted granted Critical
Publication of EP0125752B1 publication Critical patent/EP0125752B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP84301453A 1983-05-09 1984-03-06 Bonded rare earth-iron magnets Expired EP0125752B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49262983A 1983-05-09 1983-05-09
US492629 1995-06-20

Publications (3)

Publication Number Publication Date
EP0125752A2 EP0125752A2 (en) 1984-11-21
EP0125752A3 true EP0125752A3 (en) 1987-01-28
EP0125752B1 EP0125752B1 (en) 1989-12-06

Family

ID=23956982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301453A Expired EP0125752B1 (en) 1983-05-09 1984-03-06 Bonded rare earth-iron magnets

Country Status (8)

Country Link
EP (1) EP0125752B1 (en)
JP (1) JPS59211549A (en)
AU (1) AU571497B2 (en)
BR (1) BR8402029A (en)
CA (1) CA1216623A (en)
DE (1) DE3480673D1 (en)
ES (1) ES8503163A1 (en)
MX (1) MX167657B (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219904A (en) * 1983-05-30 1984-12-11 Sumitomo Special Metals Co Ltd Permanent magnet material
JPS6017905A (en) * 1983-07-08 1985-01-29 Sumitomo Special Metals Co Ltd Permanent magnet alloy powder
JPS6032306A (en) * 1983-08-02 1985-02-19 Sumitomo Special Metals Co Ltd Permanent magnet
CA1236381A (en) * 1983-08-04 1988-05-10 Robert W. Lee Iron-rare earth-boron permanent magnets by hot working
JPS60153109A (en) * 1984-01-21 1985-08-12 Sumitomo Special Metals Co Ltd Permanent magnet
US4558077A (en) * 1984-03-08 1985-12-10 General Motors Corporation Epoxy bonded rare earth-iron magnets
CA1244322A (en) * 1984-09-14 1988-11-08 Robert W. Lee Hot pressed permanent magnet having high and low coercivity regions
USRE34838E (en) * 1984-12-31 1995-01-31 Tdk Corporation Permanent magnet and method for producing same
JPH0630295B2 (en) * 1984-12-31 1994-04-20 ティーディーケイ株式会社 permanent magnet
US6136099A (en) * 1985-08-13 2000-10-24 Seiko Epson Corporation Rare earth-iron series permanent magnets and method of preparation
US5538565A (en) * 1985-08-13 1996-07-23 Seiko Epson Corporation Rare earth cast alloy permanent magnets and methods of preparation
US4689163A (en) * 1986-02-24 1987-08-25 Matsushita Electric Industrial Co., Ltd. Resin-bonded magnet comprising a specific type of ferromagnetic powder dispersed in a specific type of resin binder
JPH0687634B2 (en) * 1986-02-24 1994-11-02 松下電器産業株式会社 Permanent magnet type motor
JP2530641B2 (en) * 1986-03-20 1996-09-04 日立金属株式会社 Magnetically anisotropic bonded magnet, magnetic powder used therefor, and method for producing the same
DE3779481T2 (en) * 1986-04-15 1992-12-24 Tdk Corp PERMANENT MAGNET AND METHOD FOR THE PRODUCTION THEREOF.
EP0248665B1 (en) * 1986-06-06 1994-05-18 Seiko Instruments Inc. Rare earth-iron magnet and method of making same
KR880000992A (en) * 1986-06-12 1988-03-30 와다리 스기이찌로오 Permanent magnet
AT386554B (en) * 1986-08-04 1988-09-12 Treibacher Chemische Werke Ag METHOD FOR PRODUCING CORROSION-RESISTANT, HARD MAGNETIC POWDER FOR MAGNETIC PRODUCTION, MAGNETS FROM HARD MAGNETIC POWDER AND METHOD FOR PRODUCING THE SAME
AU609669B2 (en) * 1986-10-13 1991-05-02 N.V. Philips Gloeilampenfabrieken Method of manufacturing a permanent magnet
US4829277A (en) * 1986-11-20 1989-05-09 General Motors Corporation Isotropic rare earth-iron field magnets for magnetic resonance imaging
KR900006533B1 (en) * 1987-01-06 1990-09-07 히다찌 긴조꾸 가부시끼가이샤 Anisotropic magnetic powder, its magnet and manufacturing method thereof
US4983232A (en) 1987-01-06 1991-01-08 Hitachi Metals, Ltd. Anisotropic magnetic powder and magnet thereof and method of producing same
JP2599378B2 (en) * 1987-02-06 1997-04-09 松下電器産業株式会社 Manufacturing method of resin magnet
DE3883038T2 (en) * 1987-03-23 1994-01-05 Tokin Corp Process for producing an anisotropic rare earth-iron-boron bonded magnet with the help of band-like chips from a rare earth-iron-boron alloy.
US5460662A (en) * 1987-04-30 1995-10-24 Seiko Epson Corporation Permanent magnet and method of production
DE3750367T2 (en) * 1987-04-30 1994-12-08 Seiko Epson Corp Permanent magnet and its manufacturing process.
US5186761A (en) * 1987-04-30 1993-02-16 Seiko Epson Corporation Magnetic alloy and method of production
EP0304054B1 (en) * 1987-08-19 1994-06-08 Mitsubishi Materials Corporation Rare earth-iron-boron magnet powder and process of producing same
JP2619653B2 (en) * 1987-10-16 1997-06-11 セイコーエプソン株式会社 Rare earth magnet
US4881988A (en) * 1987-11-16 1989-11-21 Rjf International Corporation Novel flexible magnet for use in small dc motors
US4832891A (en) * 1987-11-25 1989-05-23 Eastman Kodak Company Method of making an epoxy bonded rare earth-iron magnet
JPH0614485B2 (en) * 1988-05-25 1994-02-23 大八化学工業株式会社 Surface-modified magnetic powder and bonded magnet composition containing the same
IE891581A1 (en) * 1988-06-20 1991-01-02 Seiko Epson Corp Permanent magnet and a manufacturing method thereof
JP2843379B2 (en) * 1988-10-04 1999-01-06 日立金属株式会社 Isotropic heat-resistant bonded magnet, method of manufacturing the same, magnetic powder using the same, and PM-type motor using the same
DE68916184T2 (en) * 1988-11-14 1994-11-17 Asahi Chemical Ind Magnetic substances containing rare earth elements, iron, nitrogen and hydrogen.
CA2019257A1 (en) * 1989-06-27 1990-12-27 Takuji Nomura Magnet and method for manufacturing the same
US5037492A (en) * 1989-12-19 1991-08-06 General Motors Corporation Alloying low-level additives into hot-worked Nd-Fe-B magnets
JP2780422B2 (en) * 1990-03-07 1998-07-30 松下電器産業株式会社 Method for manufacturing resin magnet structure
AU6733196A (en) * 1995-08-30 1997-03-19 Danfoss A/S Method of producing magnetic poles on a base member, and rotor of an electrical machine
JPH08181011A (en) * 1995-10-02 1996-07-12 Seiko Epson Corp Rare earth magnets
JP5752094B2 (en) * 2012-08-08 2015-07-22 ミネベア株式会社 Method for producing full-dense rare earth-iron bond magnet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB455806A (en) * 1934-07-11 1936-10-28 Max Baermann Junior Process for making permanent magnets
GB1190636A (en) * 1966-09-01 1970-05-06 Max Baermann Method of Manufacturing Anisotropic pressed Permanent Magnets.
US4197146A (en) * 1978-10-24 1980-04-08 General Electric Company Molded amorphous metal electrical magnetic components
EP0066348A2 (en) * 1981-05-11 1982-12-08 Crucible Materials Corporation Method for producing magnets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5754304A (en) * 1980-09-19 1982-03-31 Seiko Epson Corp Manufacture of permanent magnet
JPS57141901A (en) * 1981-02-26 1982-09-02 Mitsubishi Steel Mfg Co Ltd Permanent magnet powder
US4851058A (en) * 1982-09-03 1989-07-25 General Motors Corporation High energy product rare earth-iron magnet alloys
DE3379131D1 (en) * 1982-09-03 1989-03-09 Gen Motors Corp Re-tm-b alloys, method for their production and permanent magnets containing such alloys
CA1236381A (en) * 1983-08-04 1988-05-10 Robert W. Lee Iron-rare earth-boron permanent magnets by hot working

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB455806A (en) * 1934-07-11 1936-10-28 Max Baermann Junior Process for making permanent magnets
GB1190636A (en) * 1966-09-01 1970-05-06 Max Baermann Method of Manufacturing Anisotropic pressed Permanent Magnets.
US4197146A (en) * 1978-10-24 1980-04-08 General Electric Company Molded amorphous metal electrical magnetic components
EP0066348A2 (en) * 1981-05-11 1982-12-08 Crucible Materials Corporation Method for producing magnets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 128 (E-118)[1006], 14th July 1982; & JP-A-57 054 304 (SUWA SEIKOSHA K.K.) 31-03-1982 *

Also Published As

Publication number Publication date
JPH0420975B2 (en) 1992-04-07
AU2595884A (en) 1984-11-15
EP0125752B1 (en) 1989-12-06
DE3480673D1 (en) 1990-01-11
CA1216623A (en) 1987-01-13
ES532283A0 (en) 1985-02-01
BR8402029A (en) 1984-12-18
MX167657B (en) 1993-04-01
AU571497B2 (en) 1988-04-21
JPS59211549A (en) 1984-11-30
ES8503163A1 (en) 1985-02-01
EP0125752A2 (en) 1984-11-21

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