GB1415918A - Large grain cobalt-samarium intermetallic permanent magnet material stabilized with zinc and process - Google Patents

Large grain cobalt-samarium intermetallic permanent magnet material stabilized with zinc and process

Info

Publication number
GB1415918A
GB1415918A GB1399873A GB1399873A GB1415918A GB 1415918 A GB1415918 A GB 1415918A GB 1399873 A GB1399873 A GB 1399873A GB 1399873 A GB1399873 A GB 1399873A GB 1415918 A GB1415918 A GB 1415918A
Authority
GB
United Kingdom
Prior art keywords
particles
zinc
samarium
intermetallic
permanent magnet
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
GB1399873A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1415918A publication Critical patent/GB1415918A/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
    • H01F1/06—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 in the form of particles, e.g. powder
    • 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
    • H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0552—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Powder Metallurgy (AREA)

Abstract

1415918 Coating Co-Sm magnetic particles with Zn GENERAL ELECTRIC CO 22 March 1973 [17 April 1972] 13998/73 Headings C7A and C7F A melt comprising Co with 34 to 38% Sm is cast to obtain a grain size of 100 to 1000 microns; the casting is annealed at from 900‹C up to the melting point of the alloy for 5 minutes to 24 hours; the casting is comminuted to obtain a particle size of 50 to 200 microns with at least 85% of the particles being single crystal particles; the particles are mixed with 1 to 15% of zinc powder and then heated to 400 to 500 C in an inert atmosphere to coat the particles whereby the properties thereof are stabilized in air at elevated temperatures. The order of the annealing and comminuting steps may be reversed. The particles may be incorporated in a non-magnetic matrix (e.g. of plastics, elastomer, metal or wax) which is solidified under the influence of an orienting field of at least 4 kilo-oersteds,
GB1399873A 1972-04-17 1973-03-22 Large grain cobalt-samarium intermetallic permanent magnet material stabilized with zinc and process Expired GB1415918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00244423A US3811962A (en) 1972-04-17 1972-04-17 Large grain cobalt-samarium intermetallic permanent magnet material stabilized with zinc and process

Publications (1)

Publication Number Publication Date
GB1415918A true GB1415918A (en) 1975-12-03

Family

ID=22922705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1399873A Expired GB1415918A (en) 1972-04-17 1973-03-22 Large grain cobalt-samarium intermetallic permanent magnet material stabilized with zinc and process

Country Status (10)

Country Link
US (1) US3811962A (en)
JP (1) JPS5722961B2 (en)
BE (1) BE798260A (en)
CA (1) CA985068A (en)
DE (1) DE2319007A1 (en)
ES (1) ES413773A1 (en)
FR (1) FR2180897B1 (en)
GB (1) GB1415918A (en)
IT (1) IT982726B (en)
NL (1) NL7304872A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10046334B2 (en) 2012-03-30 2018-08-14 Rsr Technologies, Inc. Magnetic separation of electrochemical cell materials

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA990772A (en) * 1973-09-24 1976-06-08 Eric Whiteley Permanent magnet field structure for dynamoelectric machines
JPS57100705A (en) * 1980-12-16 1982-06-23 Seiko Epson Corp Permanent magnet
DK111582A (en) * 1982-03-12 1983-09-13 Niro Atomizer As HIGH GRADUATE MAGNETIC SEPARATOR
JPS5965832U (en) * 1982-10-25 1984-05-02 セイレイ工業株式会社 Air bleed hole structure of bellows-like boot at main gear shift lever pivot point of tractor
US5186765A (en) * 1989-07-31 1993-02-16 Kabushiki Kaisha Toshiba Cold accumulating material and method of manufacturing the same
US20150310971A1 (en) * 2014-04-25 2015-10-29 United Technologies Corporation Magnetic material and method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10046334B2 (en) 2012-03-30 2018-08-14 Rsr Technologies, Inc. Magnetic separation of electrochemical cell materials
US11103880B2 (en) 2012-03-30 2021-08-31 Rsr Technologies, Inc. Magnetic separation of electrochemical cell materials
US11919010B2 (en) 2012-03-30 2024-03-05 Rsr Technologies, Inc. Magnetic separation of electrochemical cell materials

Also Published As

Publication number Publication date
BE798260A (en) 1973-08-16
IT982726B (en) 1974-10-21
FR2180897A1 (en) 1973-11-30
DE2319007A1 (en) 1973-11-08
US3811962A (en) 1974-05-21
CA985068A (en) 1976-03-09
ES413773A1 (en) 1976-01-16
JPS5722961B2 (en) 1982-05-15
FR2180897B1 (en) 1978-11-03
NL7304872A (en) 1973-10-19
JPS4920694A (en) 1974-02-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee