GB1410267A - Permanent magnet - Google Patents

Permanent magnet

Info

Publication number
GB1410267A
GB1410267A GB2055973A GB2055973A GB1410267A GB 1410267 A GB1410267 A GB 1410267A GB 2055973 A GB2055973 A GB 2055973A GB 2055973 A GB2055973 A GB 2055973A GB 1410267 A GB1410267 A GB 1410267A
Authority
GB
United Kingdom
Prior art keywords
earth
rare
cobalt
product
alloy
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
GB2055973A
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 GB1410267A publication Critical patent/GB1410267A/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

Landscapes

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

Abstract

1410267 Cobalt rare-earth alloys GENERAL ELECTRIC CO 30 April 1973 [1 May 1972] 20559/73 Heading C7A A sintered permanent magnet cobalt rare-earth product comprising by weight:- 62 to 66% cobalt 34 to 38% samarium and neodymium the neodymium forming 40 to 60% of the rareearth content and the sintered product having substantially non-interconnecting pores and a density of at least 67% of theoretical is prepared from a base Co 5 R alloy and an additive cobalt rare-earth alloy richer in rare-earth content than the base alloy by sintering at 1050 to 1150‹C and heat-ageing at a temperature not more than 400 degrees below the sintering temperature. It is claimed that the sintered product has a maximum energy product (B H ) max of at least 14 x 10<SP>6</SP> gaussoersteds.
GB2055973A 1972-05-01 1973-04-30 Permanent magnet Expired GB1410267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00249362A US3821035A (en) 1972-05-01 1972-05-01 Sintered cobalt-neodymium-samarium intermetallic product and permanent magnets produced therefrom

Publications (1)

Publication Number Publication Date
GB1410267A true GB1410267A (en) 1975-10-15

Family

ID=22943141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2055973A Expired GB1410267A (en) 1972-05-01 1973-04-30 Permanent magnet

Country Status (9)

Country Link
US (1) US3821035A (en)
JP (1) JPS568906B2 (en)
BE (1) BE798862A (en)
DE (1) DE2321368A1 (en)
ES (1) ES413906A1 (en)
FR (1) FR2183047B1 (en)
GB (1) GB1410267A (en)
IT (1) IT984212B (en)
NL (1) NL7305994A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919001A (en) * 1974-03-04 1975-11-11 Crucible Inc Sintered rare-earth cobalt magnets comprising mischmetal plus cerium-free mischmetal
US4090892A (en) * 1975-01-14 1978-05-23 Bbc Brown Boveri & Company Limited Permanent magnetic material which contains rare earth metals, especially neodymium, and cobalt process for its production and its use
DE3379131D1 (en) * 1982-09-03 1989-03-09 Gen Motors Corp Re-tm-b alloys, method for their production and permanent magnets containing such alloys
US4851058A (en) * 1982-09-03 1989-07-25 General Motors Corporation High energy product rare earth-iron magnet alloys
US4563330A (en) * 1983-09-30 1986-01-07 Crucible Materials Corporation Samarium-cobalt magnet alloy containing praseodymium and neodymium
CA1253720A (en) * 1983-11-17 1989-05-09 David J. Larson, Jr. Ordered arrays of ferromagnetic composites
JPS60182510U (en) * 1984-05-16 1985-12-04 ヨシモトポ−ル株式会社 Tube joining device
USRE32714E (en) * 1984-09-25 1988-07-19 North Carolina State University Method of producing high performance permanent magnets
US4541877A (en) * 1984-09-25 1985-09-17 North Carolina State University Method of producing high performance permanent magnets
US4620872A (en) * 1984-10-18 1986-11-04 Mitsubishi Kinzoku Kabushiki Kaisha Composite target material and process for producing the same
US5087302A (en) * 1989-05-15 1992-02-11 Industrial Technology Research Institute Process for producing rare earth magnet

Also Published As

Publication number Publication date
FR2183047A1 (en) 1973-12-14
ES413906A1 (en) 1976-05-16
JPS4941218A (en) 1974-04-18
FR2183047B1 (en) 1978-09-08
BE798862A (en) 1973-08-16
US3821035A (en) 1974-06-28
NL7305994A (en) 1973-11-05
IT984212B (en) 1974-11-20
DE2321368A1 (en) 1973-11-22
JPS568906B2 (en) 1981-02-26

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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