GB1324923A - Process for making permanent magnets - Google Patents

Process for making permanent magnets

Info

Publication number
GB1324923A
GB1324923A GB5010071A GB5010071A GB1324923A GB 1324923 A GB1324923 A GB 1324923A GB 5010071 A GB5010071 A GB 5010071A GB 5010071 A GB5010071 A GB 5010071A GB 1324923 A GB1324923 A GB 1324923A
Authority
GB
United Kingdom
Prior art keywords
rare earth
intermetallic compound
permanent magnets
mixture
earth metal
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
GB5010071A
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 GB1324923A publication Critical patent/GB1324923A/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
    • H01F1/0553—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 obtained by reduction or by hydrogen decrepitation or embrittlement
    • 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
    • C22C19/07—Alloys based on nickel or cobalt based on 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

1324923 Sintered permanent magnets BROWN BOVERI & CO Ltd 28 Oct 1971 [13 Nov 1970] 50100/71 Heading C7D Rare earth metal hydride power e.g. 5-20 wt. per cent is added to a powdered intermetallic compound consisting of at least one 3a transistor element e.g. Fe, Co, Ni and at least one rare earth metal and the mixture is sintered to form a permanent magnet. The preferred intermetallic compound is R 2 CO 1 7 or RCO 5 where R is Y, La, Ce, Pr, Nd or Sm and the mixture is preferably milled to 5 micron size prior to hydrostatically pressing in a magnetic field and then vacuum degassing at 400-500‹ C and sintering in inert gas at 900-1100‹C. The intermetallic compound and hydride may contain the same or different rare earth metals.
GB5010071A 1970-11-13 1971-10-28 Process for making permanent magnets Expired GB1324923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1682570A CH551077A (en) 1970-11-13 1970-11-13 METHOD FOR MANUFACTURING FINE PARTICLE PERMANENT MAGNETS.

Publications (1)

Publication Number Publication Date
GB1324923A true GB1324923A (en) 1973-07-25

Family

ID=4420552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5010071A Expired GB1324923A (en) 1970-11-13 1971-10-28 Process for making permanent magnets

Country Status (4)

Country Link
CH (1) CH551077A (en)
FR (1) FR2120698A5 (en)
GB (1) GB1324923A (en)
NL (1) NL7115528A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201426A (en) * 1987-02-27 1988-09-01 Philips Electronic Associated Improved method for the manufacture of rare earth transition metal alloy magnets
WO2015057180A1 (en) * 2013-10-14 2015-04-23 Анатолий Иванович ОЛЕФИРЕНКО Permanent magnet preparation method
RU2680254C2 (en) * 2013-10-14 2019-02-19 Анатолий Иванович Олефиренко Method of manufacturing permanent magnets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201426A (en) * 1987-02-27 1988-09-01 Philips Electronic Associated Improved method for the manufacture of rare earth transition metal alloy magnets
GB2201426B (en) * 1987-02-27 1990-05-30 Philips Electronic Associated Improved method for the manufacture of rare earth transition metal alloy magnets
WO2015057180A1 (en) * 2013-10-14 2015-04-23 Анатолий Иванович ОЛЕФИРЕНКО Permanent magnet preparation method
RU2680254C2 (en) * 2013-10-14 2019-02-19 Анатолий Иванович Олефиренко Method of manufacturing permanent magnets

Also Published As

Publication number Publication date
CH551077A (en) 1974-06-28
DE2059301B2 (en) 1972-10-26
FR2120698A5 (en) 1972-08-18
NL7115528A (en) 1972-05-16
DE2059301A1 (en) 1972-05-31

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Legal Events

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