EP0255939A3 - Rare earth magnet and rare earth magnet alloy powder having high corrosion resistance - Google Patents

Rare earth magnet and rare earth magnet alloy powder having high corrosion resistance Download PDF

Info

Publication number
EP0255939A3
EP0255939A3 EP87111257A EP87111257A EP0255939A3 EP 0255939 A3 EP0255939 A3 EP 0255939A3 EP 87111257 A EP87111257 A EP 87111257A EP 87111257 A EP87111257 A EP 87111257A EP 0255939 A3 EP0255939 A3 EP 0255939A3
Authority
EP
European Patent Office
Prior art keywords
rare earth
earth magnet
corrosion resistance
alloy powder
high corrosion
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
EP87111257A
Other versions
EP0255939B1 (en
EP0255939A2 (en
Inventor
Setsuo Sumitomo Special Metals Co. Ltd. Fujimura
Masato Sumitomo Special Metals Co. Ltd. Sagawa
Hitoshi Sumitomo Special Metals Co. Ltd Yamamoto
Satoshi Sumitomo Special Metals Co. Ltd Hirosawa
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.)
Neomax Co Ltd
Original Assignee
Sumitomo Special Metals Co Ltd
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
Priority claimed from JP61182998A external-priority patent/JPH0668144B2/en
Application filed by Sumitomo Special Metals Co Ltd filed Critical Sumitomo Special Metals Co Ltd
Priority to AT87111257T priority Critical patent/ATE92209T1/en
Publication of EP0255939A2 publication Critical patent/EP0255939A2/en
Publication of EP0255939A3 publication Critical patent/EP0255939A3/en
Application granted granted Critical
Publication of EP0255939B1 publication Critical patent/EP0255939B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H01F1/0572—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 with a protective layer
    • 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
    • H01F1/0577—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 sintered

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
EP19870111257 1986-08-04 1987-08-04 Rare earth magnet and rare earth magnet alloy powder having high corrosion resistance Expired - Lifetime EP0255939B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111257T ATE92209T1 (en) 1986-08-04 1987-08-04 RARE EARTH MAGNET AND RARE EARTH ALLOY MAGNET POWDER WITH HIGH CORROSION RESISTANCE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP182998/86 1986-08-04
JP61182998A JPH0668144B2 (en) 1986-08-04 1986-08-04 Rare earth magnet material with excellent corrosion resistance
US90173686A 1986-08-29 1986-08-29
US901736 1986-08-29

Publications (3)

Publication Number Publication Date
EP0255939A2 EP0255939A2 (en) 1988-02-17
EP0255939A3 true EP0255939A3 (en) 1989-05-31
EP0255939B1 EP0255939B1 (en) 1993-07-28

Family

ID=26501584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870111257 Expired - Lifetime EP0255939B1 (en) 1986-08-04 1987-08-04 Rare earth magnet and rare earth magnet alloy powder having high corrosion resistance

Country Status (4)

Country Link
EP (1) EP0255939B1 (en)
CN (1) CN1051865C (en)
CA (1) CA1336866C (en)
DE (1) DE3786719T2 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740157A1 (en) * 1987-11-26 1989-06-08 Max Planck Gesellschaft SINTER MAGNET BASED ON FE-ND-B
US5162064A (en) * 1990-04-10 1992-11-10 Crucible Materials Corporation Permanent magnet having improved corrosion resistance and method for producing the same
JPH04337604A (en) * 1991-05-14 1992-11-25 Seiko Instr Inc Rare-earth iron permanent magnet
CN1066280C (en) * 1993-04-16 2001-05-23 同和矿业株式会社 Permanent magnet alloy having improved resistance to oxidation
EP0886284B1 (en) * 1996-04-10 2002-10-23 Showa Denko Kabushiki Kaisha Cast alloy used for production of rare earth magnet and method for producing cast alloy and magnet
JP2001332410A (en) * 2000-05-22 2001-11-30 Seiko Epson Corp Magnet powder, its manufacturing method, and bond magnet
KR100771676B1 (en) * 2000-10-04 2007-10-31 가부시키가이샤 네오맥스 Rare earth sintered magnet and method for manufacturing the same
EP1830371B1 (en) 2004-10-19 2016-07-27 Shin-Etsu Chemical Co., Ltd. Method for producing rare earth permanent magnet material
CN101026034B (en) * 2006-02-22 2010-05-12 南京理工大学 Method for preparing corrosion resistance rare earth permanent-magnetic material
JP4656323B2 (en) 2006-04-14 2011-03-23 信越化学工業株式会社 Method for producing rare earth permanent magnet material
US7955443B2 (en) 2006-04-14 2011-06-07 Shin-Etsu Chemical Co., Ltd. Method for preparing rare earth permanent magnet material
JP4753030B2 (en) * 2006-04-14 2011-08-17 信越化学工業株式会社 Method for producing rare earth permanent magnet material
JP4840606B2 (en) 2006-11-17 2011-12-21 信越化学工業株式会社 Rare earth permanent magnet manufacturing method
MY149353A (en) 2007-03-16 2013-08-30 Shinetsu Chemical Co Rare earth permanent magnet and its preparations
WO2008146368A1 (en) * 2007-05-30 2008-12-04 Shin-Etsu Chemical Co., Ltd. Process for producing highly anticorrosive rare earth permanent magnet and method of using the same
JP5303738B2 (en) * 2010-07-27 2013-10-02 Ｔｄｋ株式会社 Rare earth sintered magnet
CN105599382A (en) * 2015-12-23 2016-05-25 常熟市东方特种金属材料厂 Compound anti-oxidative special metal material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134304A1 (en) * 1983-08-04 1985-03-20 Sumitomo Special Metals Co., Ltd. Permanent magnets
EP0216254A1 (en) * 1985-09-10 1987-04-01 Kabushiki Kaisha Toshiba Permanent magnet
EP0237416A1 (en) * 1986-03-06 1987-09-16 Shin-Etsu Chemical Co., Ltd. A rare earth-based permanent magnet

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6148904A (en) * 1984-08-16 1986-03-10 Hitachi Metals Ltd Manufacture of permanent magnet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134304A1 (en) * 1983-08-04 1985-03-20 Sumitomo Special Metals Co., Ltd. Permanent magnets
EP0216254A1 (en) * 1985-09-10 1987-04-01 Kabushiki Kaisha Toshiba Permanent magnet
EP0237416A1 (en) * 1986-03-06 1987-09-16 Shin-Etsu Chemical Co., Ltd. A rare earth-based permanent magnet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 209 (E-421)[2265], July 22, 1986; & JP-A-61 048 904 (HITACHI METALS LTD) (10-03-1986) *

Also Published As

Publication number Publication date
DE3786719T2 (en) 1993-12-09
EP0255939B1 (en) 1993-07-28
DE3786719D1 (en) 1993-09-02
CN87106209A (en) 1988-04-27
CN1051865C (en) 2000-04-26
CA1336866C (en) 1995-09-05
EP0255939A2 (en) 1988-02-17

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