GB1369840A - Process for the manufacture of sintered permanent magnets based on cobalt alloys - Google Patents

Process for the manufacture of sintered permanent magnets based on cobalt alloys

Info

Publication number
GB1369840A
GB1369840A GB6051771A GB6051771A GB1369840A GB 1369840 A GB1369840 A GB 1369840A GB 6051771 A GB6051771 A GB 6051771A GB 6051771 A GB6051771 A GB 6051771A GB 1369840 A GB1369840 A GB 1369840A
Authority
GB
United Kingdom
Prior art keywords
sintered
permanent magnets
smco
rco
manufacture
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.)
Expired
Application number
GB6051771A
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.)
SERMAG
Original Assignee
SERMAG
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 SERMAG filed Critical SERMAG
Publication of GB1369840A publication Critical patent/GB1369840A/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
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0433—Nickel- or cobalt-based alloys
    • C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt

Landscapes

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

Abstract

1369840 Sintered rare earth-cobalt magnets SOC D'ETUDES ET DE RECHERCHES MAGNETIQUES 29 Dec 1971 [29 Dec 1970] 60517/71 Heading C7D Sintered permanent magnets are made from a powder mixture of RCo 5 and RCo x where X is <5 and R is a rare earth or Y, which is compacted in a magnetic field and the compacts are embedded in a powder of an alloy of R having a melting point higher than that of RCo 5 , prior to sintering in an inert atmosphere. The preferred mixtures contain in parts by weight, 84 Sm Co 5 -16 SmCo 2 ; 87À8 Sm Co 5 -12À2 Sm Co 2 and 91À6 SmCo 5 -8À4 SmCo 2 . The compacts are embedded in powdered Sm 2 Co 17 or Sm Ni 15 and sintered in He at 1105‹ or 1115‹ C. The sintered compact is then re-magnetized.
GB6051771A 1970-12-29 1971-12-29 Process for the manufacture of sintered permanent magnets based on cobalt alloys Expired GB1369840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7047021A FR2120303A5 (en) 1970-12-29 1970-12-29

Publications (1)

Publication Number Publication Date
GB1369840A true GB1369840A (en) 1974-10-09

Family

ID=9066486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6051771A Expired GB1369840A (en) 1970-12-29 1971-12-29 Process for the manufacture of sintered permanent magnets based on cobalt alloys

Country Status (6)

Country Link
CH (1) CH539325A (en)
DE (1) DE2165054C3 (en)
FR (1) FR2120303A5 (en)
GB (1) GB1369840A (en)
IT (1) IT944398B (en)
NL (1) NL165322C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2182635B1 (en) * 1972-05-02 1978-03-03 Sermag
CH604342A5 (en) * 1976-10-04 1978-09-15 Bbc Brown Boveri & Cie

Also Published As

Publication number Publication date
DE2165054A1 (en) 1973-07-26
FR2120303A5 (en) 1972-08-18
NL7118016A (en) 1972-07-03
IT944398B (en) 1973-04-20
DE2165054C3 (en) 1975-05-28
DE2165054B2 (en) 1974-10-10
NL165322C (en) 1981-03-16
NL165322B (en) 1980-10-15
CH539325A (en) 1973-07-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee