GB1479871A - Permanent magnetic material which contains rare earth metals especially neodymium and cobalt process for its production and use - Google Patents

Permanent magnetic material which contains rare earth metals especially neodymium and cobalt process for its production and use

Info

Publication number
GB1479871A
GB1479871A GB4496175A GB4496175A GB1479871A GB 1479871 A GB1479871 A GB 1479871A GB 4496175 A GB4496175 A GB 4496175A GB 4496175 A GB4496175 A GB 4496175A GB 1479871 A GB1479871 A GB 1479871A
Authority
GB
United Kingdom
Prior art keywords
production
rare earth
magnetic material
argon
earth metals
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
GB4496175A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
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 BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1479871A publication Critical patent/GB1479871A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C22C19/07—Alloys based on nickel or cobalt based on cobalt
    • 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

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)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

1479871 Permanent magnet materials BBC BROWN BOVERI & CO Ltd 30 Oct 1975 [14 Jan 1975] 44961/75 Heading C7A A permanent magnet material with the general Formula: - (MM 1-x Md x ) 1-y Smy Cos wherein 0À25 # x < 1À0, 0 # y < 0À25 and MM is a mixed metal containing Ceα La# Prγ where:- 0À50 < α < 0À70 0À22 < # < 0À45 0À0 < γ < 0À06 and α+#+γ=1 is made by melting stoichochemical proportions of the alloys in BC crucibles in argon in a MF furnace at about 1200‹C. After fusion, the cooled alloys are ground and mixed with powdered sintered additives i.e. Sm40 Co60, so that 10-14% of the total weight of the mixture is the Sm40Co60 additive. The mixture is pressed, magnetically aligned, further isostatically pressed at 600 atmospheres and sintered at 1040‹C prior to heat-treating at 980‹C and cooling in argon or liquid nitrogen. Further annealing at 350‹C is employed. Permanent magnets made by this process and with this composition are said to have a coercitive field strength which is independent of temperature between RT - 300‹C, and are consequently of value as permanent magnets in electric motors.
GB4496175A 1975-01-14 1975-10-30 Permanent magnetic material which contains rare earth metals especially neodymium and cobalt process for its production and use Expired GB1479871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH39875A CH599661A5 (en) 1975-01-14 1975-01-14

Publications (1)

Publication Number Publication Date
GB1479871A true GB1479871A (en) 1977-07-13

Family

ID=4186105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4496175A Expired GB1479871A (en) 1975-01-14 1975-10-30 Permanent magnetic material which contains rare earth metals especially neodymium and cobalt process for its production and use

Country Status (7)

Country Link
JP (1) JPS6012416B2 (en)
CA (1) CA1037294A (en)
CH (1) CH599661A5 (en)
DE (1) DE2504838C2 (en)
FR (1) FR2297926A1 (en)
GB (1) GB1479871A (en)
NL (1) NL177536C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040342C2 (en) * 1980-10-25 1982-08-12 Th. Goldschmidt Ag, 4300 Essen Alloy suitable for making a permanent magnet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH578239A5 (en) * 1971-12-27 1976-07-30 Bbc Brown Boveri & Cie
JPS5724058B2 (en) * 1973-11-12 1982-05-21
CH618537A5 (en) * 1974-08-13 1980-07-31 Bbc Brown Boveri & Cie Permanent-magnetic material containing rare earths and cobalt.

Also Published As

Publication number Publication date
NL177536B (en) 1985-05-01
FR2297926B1 (en) 1979-08-31
FR2297926A1 (en) 1976-08-13
DE2504838A1 (en) 1976-07-15
JPS5196726A (en) 1976-08-25
JPS6012416B2 (en) 1985-04-01
NL177536C (en) 1985-10-01
CA1037294A (en) 1978-08-29
NL7600238A (en) 1976-07-16
DE2504838C2 (en) 1985-10-24
CH599661A5 (en) 1978-05-31

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee