JPS6448403A - Rare earth-iron-boron magnet powder and manufacture thereof - Google Patents

Rare earth-iron-boron magnet powder and manufacture thereof

Info

Publication number
JPS6448403A
JPS6448403A JP62205941A JP20594187A JPS6448403A JP S6448403 A JPS6448403 A JP S6448403A JP 62205941 A JP62205941 A JP 62205941A JP 20594187 A JP20594187 A JP 20594187A JP S6448403 A JPS6448403 A JP S6448403A
Authority
JP
Japan
Prior art keywords
phase
iron
rare earth
magnet powder
boron magnet
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.)
Pending
Application number
JP62205941A
Other languages
Japanese (ja)
Inventor
Takuo Takeshita
Hiroyuki Baba
Ryoji Nakayama
Tamotsu Ogawa
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.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal 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
Application filed by Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP62205941A priority Critical patent/JPS6448403A/en
Publication of JPS6448403A publication Critical patent/JPS6448403A/en
Pending 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
    • H01F1/0573—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 obtained by reduction or by hydrogen decrepitation or embrittlement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To obtain sufficient coercive force by specifying the range of an R2Fe14B phase and the presence of said phase in rare earth-iron-boron magnet powder and a range in which the surface of said phase is coated with a rich phase. CONSTITUTION:The abundance ratio of an R2Fe14B phase (a main phase) and an R-rich phase is brought to 60vol.%<the main phase<98vol.% and 2vol.%< the R-rich phase<40vol.%, the main phase is kept within the magnitude of a range from 0.3mum to 50mum, the main phase is made to exist in a single crystal at 50% or more of rare earth-iron-boron magnet powder, and 70% or more of the surface of the main phase is coated with the R-rich phase. Hydrogen is occluded only to the R-rich phase, and discharged and only the R-rich phase is crushed 1 and rare earth-iron-boron magnet powder, on the surface of the main phase of which the R-rich phase sufficiently exists, is formed. Accordingly, magnetic characteristics can be improved.
JP62205941A 1987-08-19 1987-08-19 Rare earth-iron-boron magnet powder and manufacture thereof Pending JPS6448403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62205941A JPS6448403A (en) 1987-08-19 1987-08-19 Rare earth-iron-boron magnet powder and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62205941A JPS6448403A (en) 1987-08-19 1987-08-19 Rare earth-iron-boron magnet powder and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS6448403A true JPS6448403A (en) 1989-02-22

Family

ID=16515255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62205941A Pending JPS6448403A (en) 1987-08-19 1987-08-19 Rare earth-iron-boron magnet powder and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS6448403A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06120015A (en) * 1990-07-25 1994-04-28 Aimants Ugimag Sa Method for manufacture of pulverized rare- earth/transistion metal/boron-type msgnetic material for corrosion-resistant magnet
FR2698999A1 (en) * 1992-12-08 1994-06-10 Ugimag Sa Two-part magnetic material
EP0601943A1 (en) * 1992-12-08 1994-06-15 Ugimag S.A. R-Fe-B type magnet powder, sintered magnets therefrom and preparation process
US5593517A (en) * 1993-09-17 1997-01-14 Kabushiki Kaisha Toshiba Regenerating material and refrigerator using the same
JP2021111777A (en) * 2019-12-31 2021-08-02 煙台首鋼磁性材料株式有限公司 MANUFACTURING METHOD OF Nd-Fe-B BASED MAGNETIC POWDER

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59222564A (en) * 1983-05-31 1984-12-14 Sumitomo Special Metals Co Ltd Rare earth-ferrous magnetic material and permanent magnet
JPS6063304A (en) * 1983-09-17 1985-04-11 Sumitomo Special Metals Co Ltd Production of alloy powder for rare earth-boron-iron permanent magnet
JPS61199005A (en) * 1985-02-28 1986-09-03 Daido Steel Co Ltd Production of magnetic powder
JPS61222102A (en) * 1985-03-28 1986-10-02 Toshiba Corp Rare earth iron group permanent magnet
JPS6223902A (en) * 1985-07-23 1987-01-31 Sumitomo Special Metals Co Ltd Alloy powder for rare earth magnet and its production
JPS62132302A (en) * 1985-12-04 1987-06-15 Sumitomo Metal Mining Co Ltd Rare earth element-iron-boron alloy powder and manufacture thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59222564A (en) * 1983-05-31 1984-12-14 Sumitomo Special Metals Co Ltd Rare earth-ferrous magnetic material and permanent magnet
JPS6063304A (en) * 1983-09-17 1985-04-11 Sumitomo Special Metals Co Ltd Production of alloy powder for rare earth-boron-iron permanent magnet
JPS61199005A (en) * 1985-02-28 1986-09-03 Daido Steel Co Ltd Production of magnetic powder
JPS61222102A (en) * 1985-03-28 1986-10-02 Toshiba Corp Rare earth iron group permanent magnet
JPS6223902A (en) * 1985-07-23 1987-01-31 Sumitomo Special Metals Co Ltd Alloy powder for rare earth magnet and its production
JPS62132302A (en) * 1985-12-04 1987-06-15 Sumitomo Metal Mining Co Ltd Rare earth element-iron-boron alloy powder and manufacture thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06120015A (en) * 1990-07-25 1994-04-28 Aimants Ugimag Sa Method for manufacture of pulverized rare- earth/transistion metal/boron-type msgnetic material for corrosion-resistant magnet
FR2698999A1 (en) * 1992-12-08 1994-06-10 Ugimag Sa Two-part magnetic material
EP0601943A1 (en) * 1992-12-08 1994-06-15 Ugimag S.A. R-Fe-B type magnet powder, sintered magnets therefrom and preparation process
US5593517A (en) * 1993-09-17 1997-01-14 Kabushiki Kaisha Toshiba Regenerating material and refrigerator using the same
JP2021111777A (en) * 2019-12-31 2021-08-02 煙台首鋼磁性材料株式有限公司 MANUFACTURING METHOD OF Nd-Fe-B BASED MAGNETIC POWDER

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