JPS6448405A - Manufacture of rare earth-iron-boron magnet - Google Patents

Manufacture of rare earth-iron-boron magnet

Info

Publication number
JPS6448405A
JPS6448405A JP62205942A JP20594287A JPS6448405A JP S6448405 A JPS6448405 A JP S6448405A JP 62205942 A JP62205942 A JP 62205942A JP 20594287 A JP20594287 A JP 20594287A JP S6448405 A JPS6448405 A JP S6448405A
Authority
JP
Japan
Prior art keywords
phase
iron
boron magnet
r2fe14b
green compact
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
JP62205942A
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 JP62205942A priority Critical patent/JPS6448405A/en
Publication of JPS6448405A publication Critical patent/JPS6448405A/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
    • H01F1/0575—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
    • H01F1/0576—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 pressed, e.g. hot working

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To improve magnetic characteristics by a method wherein specific rare earths-iron-boron magnet powder is compression-molded, a green compact is manufactured, a temperature and pressure are specified and the green compact is hot-hydrostatic-pressed. CONSTITUTION:In rare earths-iron-boron magnet powder containing a ferromagnetic R2Fe14B phase 1 (R represents one kind or more of rare earth elements including Y) and a non-magnetic phase (an R rich phase 2) further abounding in rare earth elements, the abundance ratio of the R2Fe14B phase 1 and the R rich phase 2 is brought to 60vol.%<the R2Fe14B phase<98vol.% and 2vol.%<the R rich phase<40vol.%, the R2Fe14B phase is kept within the magnitude of a range from 0.3mum to 50mum, and the R2Fe14B phase is made to exist in a single crystal at 50% or more of rare earths-iron-boron magnet powder. Rare earths-iron-boron magnet powder, 70% or more of the surface of the R2Fe14B phase of which is coated with the R rich phase 2 and which is hardly strained, is compression-molded and a green compact is manufactured, and the green compact is hot-hydrostatic-pressed at a temperature from 500 deg.C to 900 deg.C and pressure of 3.5X10<5>Torr or more. Accordingly, magnetic characteristics are improved.
JP62205942A 1987-08-19 1987-08-19 Manufacture of rare earth-iron-boron magnet Pending JPS6448405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62205942A JPS6448405A (en) 1987-08-19 1987-08-19 Manufacture of rare earth-iron-boron magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62205942A JPS6448405A (en) 1987-08-19 1987-08-19 Manufacture of rare earth-iron-boron magnet

Publications (1)

Publication Number Publication Date
JPS6448405A true JPS6448405A (en) 1989-02-22

Family

ID=16515269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62205942A Pending JPS6448405A (en) 1987-08-19 1987-08-19 Manufacture of rare earth-iron-boron magnet

Country Status (1)

Country Link
JP (1) JPS6448405A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651366A1 (en) * 1989-08-31 1991-03-01 Centre Nat Rech Scient Surface-doped iron-based magnetic material and method of obtaining it
EP0561650A2 (en) * 1992-03-19 1993-09-22 Sumitomo Special Metal Co., Ltd. Alloy powder material for R-Fe-B permanent magnets
JPH0571419U (en) * 1992-03-04 1993-09-28 誠一朗 高崎 nail
US20220293310A1 (en) * 2021-03-15 2022-09-15 Tdk Corporation Rare-earth-based magnet powder, bonded magnet, bonded magnet compound, sintered magnet, method of manufacturing rare-earth-based magnet powder, and method of manufacturing rare-earth based permanent magnet

Citations (8)

* 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
JPS60162750A (en) * 1984-02-01 1985-08-24 Nippon Gakki Seizo Kk Rare earth magnet and its production
JPS61136656A (en) * 1984-12-07 1986-06-24 Sumitomo Special Metals Co Ltd Production of sintered material for permanent magnet
JPS61222102A (en) * 1985-03-28 1986-10-02 Toshiba Corp Rare earth iron group permanent magnet
JPS61295342A (en) * 1985-06-24 1986-12-26 Hitachi Metals Ltd Manufacture of permanent magnet alloy
JPS6217149A (en) * 1985-07-16 1987-01-26 Sumitomo Special Metals Co Ltd Manufacture of sintered permanent magnet material
JPS6223959A (en) * 1985-07-25 1987-01-31 Sumitomo Special Metals Co Ltd High-efficiency permanent magnet material
JPS6223960A (en) * 1985-07-24 1987-01-31 Sumitomo Special Metals Co Ltd High-efficiency permanent magnet material

Patent Citations (8)

* 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
JPS60162750A (en) * 1984-02-01 1985-08-24 Nippon Gakki Seizo Kk Rare earth magnet and its production
JPS61136656A (en) * 1984-12-07 1986-06-24 Sumitomo Special Metals Co Ltd Production of sintered material for permanent magnet
JPS61222102A (en) * 1985-03-28 1986-10-02 Toshiba Corp Rare earth iron group permanent magnet
JPS61295342A (en) * 1985-06-24 1986-12-26 Hitachi Metals Ltd Manufacture of permanent magnet alloy
JPS6217149A (en) * 1985-07-16 1987-01-26 Sumitomo Special Metals Co Ltd Manufacture of sintered permanent magnet material
JPS6223960A (en) * 1985-07-24 1987-01-31 Sumitomo Special Metals Co Ltd High-efficiency permanent magnet material
JPS6223959A (en) * 1985-07-25 1987-01-31 Sumitomo Special Metals Co Ltd High-efficiency permanent magnet material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651366A1 (en) * 1989-08-31 1991-03-01 Centre Nat Rech Scient Surface-doped iron-based magnetic material and method of obtaining it
JPH0571419U (en) * 1992-03-04 1993-09-28 誠一朗 高崎 nail
EP0561650A2 (en) * 1992-03-19 1993-09-22 Sumitomo Special Metal Co., Ltd. Alloy powder material for R-Fe-B permanent magnets
US20220293310A1 (en) * 2021-03-15 2022-09-15 Tdk Corporation Rare-earth-based magnet powder, bonded magnet, bonded magnet compound, sintered magnet, method of manufacturing rare-earth-based magnet powder, and method of manufacturing rare-earth based permanent magnet

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