JPS6448406A - Magnet powder for sintering rare earth-iron-boron and manufacture thereof - Google Patents

Magnet powder for sintering rare earth-iron-boron and manufacture thereof

Info

Publication number
JPS6448406A
JPS6448406A JP62205943A JP20594387A JPS6448406A JP S6448406 A JPS6448406 A JP S6448406A JP 62205943 A JP62205943 A JP 62205943A JP 20594387 A JP20594387 A JP 20594387A JP S6448406 A JPS6448406 A JP S6448406A
Authority
JP
Japan
Prior art keywords
phase
rare earth
r2fe14b
boron
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.)
Pending
Application number
JP62205943A
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 JP62205943A priority Critical patent/JPS6448406A/en
Publication of JPS6448406A publication Critical patent/JPS6448406A/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 improve magnetic characteristics by containing a ferromagnetic R2Fe14B phase (R represents one kind or more of rare earth elements including Y) at a specific rate. CONSTITUTION:A ferromagnetic R2Fe14B phase 1 (R represents one kind or more of rare earth elements containing Y) is included at the rate of 95vol.%< the R2Fe14B phase<98vol.%. Hydrogen is occluded into a rare earths-iron-boron magnet alloy raw material, in which there are three phases of the ferromagnetic R2Fe14B phase 1, a non-magnetic phase (an R rich phase 2) further abundant in rare earth elements and a non-magnetic phase (a B rich phase 3) abundant in boron, under conditions of a temperature of 20-650 deg.C and hydrogen partial pressure of 1X10<-3>-760Torr, and hydrogen is discharged under conditions of the temperature of 20-650 deg.C and pressure of 1X10<-3>Torr or less. The rare earths-iron-boron magnet alloy raw material is crushed to fines, and the crushed magnet fines are magnetically separated to be cleared of the R rich phase and the B rich phase not bonded with the R2Fe14B phase. Accordingly, magnetic characteristics are improved.
JP62205943A 1987-08-19 1987-08-19 Magnet powder for sintering rare earth-iron-boron and manufacture thereof Pending JPS6448406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62205943A JPS6448406A (en) 1987-08-19 1987-08-19 Magnet powder for sintering rare earth-iron-boron and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62205943A JPS6448406A (en) 1987-08-19 1987-08-19 Magnet powder for sintering rare earth-iron-boron and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS6448406A true JPS6448406A (en) 1989-02-22

Family

ID=16515285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62205943A Pending JPS6448406A (en) 1987-08-19 1987-08-19 Magnet powder for sintering rare earth-iron-boron and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS6448406A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664086A1 (en) * 1990-07-02 1992-01-03 Centre Nat Rech Scient IMPROVED PROCESS FOR THE OPTIMIZATION OF MAGNETIC PROPERTIES OF POWDER MAGNETIC MATERIALS AND PRODUCTS THUS OBTAINED.
CN108630367A (en) * 2017-03-22 2018-10-09 Tdk株式会社 R-t-b based rare earth magnet

Citations (5)

* 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
JPS61222102A (en) * 1985-03-28 1986-10-02 Toshiba Corp Rare earth iron group permanent magnet
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
JPS6223902A (en) * 1985-07-23 1987-01-31 Sumitomo Special Metals Co Ltd Alloy powder for rare earth magnet and its production

Patent Citations (5)

* 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
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
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664086A1 (en) * 1990-07-02 1992-01-03 Centre Nat Rech Scient IMPROVED PROCESS FOR THE OPTIMIZATION OF MAGNETIC PROPERTIES OF POWDER MAGNETIC MATERIALS AND PRODUCTS THUS OBTAINED.
CN108630367A (en) * 2017-03-22 2018-10-09 Tdk株式会社 R-t-b based rare earth magnet
CN108630367B (en) * 2017-03-22 2020-06-05 Tdk株式会社 R-T-B rare earth magnet

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