ES413772A1 - Large grain cobalt-samarium intermetallic permanent magnet material and process - Google Patents

Large grain cobalt-samarium intermetallic permanent magnet material and process

Info

Publication number
ES413772A1
ES413772A1 ES413772A ES413772A ES413772A1 ES 413772 A1 ES413772 A1 ES 413772A1 ES 413772 A ES413772 A ES 413772A ES 413772 A ES413772 A ES 413772A ES 413772 A1 ES413772 A1 ES 413772A1
Authority
ES
Spain
Prior art keywords
microns
ranging
samarium
annealed
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
ES413772A
Other languages
Spanish (es)
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 ES413772A1 publication Critical patent/ES413772A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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

Abstract

An alloy of cobalt and samarium is cast to produce a cast body having grains ranging in size from about 100 microns to 1000 microns. The cast body is annealed in an atmosphere in which it is substantially inert at a temperature ranging from about 900 DEG C up to a temperature below its melting point for a period of time ranging from about 5 minutes to 24 hours. To get significantly useful permanent magnet properties, it should be annealed at a particular annealing temperature for a period of time sufficient for the resulting free grains to show at room temperature, after being magnetized to at least approach saturation magnetization, a relative magnetization value of 411J/Br of at least 50 percent at a demagnetizing field of -4 kilooersteds with relative magnetization 411J/Br, by definition, being 1.00 at zero demagnetizing field. The annealed body is then comminuted to a grain size corresponding to or smaller than the grain size of the cast body and ranging from about 50 microns to 200 microns.
ES413772A 1972-04-17 1973-04-16 Large grain cobalt-samarium intermetallic permanent magnet material and process Expired ES413772A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00244424A US3844850A (en) 1972-04-17 1972-04-17 Large grain cobalt-samarium intermetallic permanent magnet material and process

Publications (1)

Publication Number Publication Date
ES413772A1 true ES413772A1 (en) 1976-01-16

Family

ID=22922710

Family Applications (1)

Application Number Title Priority Date Filing Date
ES413772A Expired ES413772A1 (en) 1972-04-17 1973-04-16 Large grain cobalt-samarium intermetallic permanent magnet material and process

Country Status (10)

Country Link
US (1) US3844850A (en)
JP (1) JPS5751244B2 (en)
BE (1) BE798261A (en)
CA (1) CA975997A (en)
DE (1) DE2318929C2 (en)
ES (1) ES413772A1 (en)
FR (1) FR2180895B1 (en)
GB (1) GB1415772A (en)
IT (1) IT982661B (en)
NL (1) NL7304871A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099995A (en) * 1974-07-31 1978-07-11 Bbc Brown, Boveri & Company, Ltd. Copper-hardened permanent-magnet alloy
US4116726A (en) * 1974-12-18 1978-09-26 Bbc Brown, Boveri & Company Limited As-cast permanent magnet Sm-Co-Cu material with iron, produced by annealing and rapid quenching
CH601484A5 (en) * 1974-12-18 1978-07-14 Bbc Brown Boveri & Cie
JPS5379719A (en) * 1976-12-24 1978-07-14 Seiko Instr & Electronics Ltd Rare earth elements cobalt permanent magnetic
JPH01147214A (en) * 1987-12-04 1989-06-08 Matsushita Electric Ind Co Ltd Kerosene stove

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421889A (en) * 1966-01-13 1969-01-14 Us Air Force Magnetic rare earth-cobalt alloys
NL6608335A (en) * 1966-06-16 1967-12-18
US3540945A (en) * 1967-06-05 1970-11-17 Us Air Force Permanent magnets
US3516612A (en) * 1968-02-28 1970-06-23 Gen Electric Sizing of fine particle ferromagnetic materials
US3615914A (en) * 1968-06-21 1971-10-26 Gen Electric Method of stabilizing permanent magnetic material powders
CH519361A (en) * 1968-11-22 1972-02-29 Raytheon Co Process for manufacturing a permanent magnet
DE1936508C3 (en) * 1969-07-18 1983-12-08 General Electric Co., New York, N.Y. Process for stabilizing the coercive force of powder for permanent magnets
US3684591A (en) * 1970-08-24 1972-08-15 Gen Electric Sintered cobalt-rare earth intermetallic product including samarium and cerium and permanent magnets produced therefrom

Also Published As

Publication number Publication date
DE2318929A1 (en) 1973-10-31
US3844850A (en) 1974-10-29
FR2180895B1 (en) 1978-11-03
DE2318929C2 (en) 1982-09-02
IT982661B (en) 1974-10-21
CA975997A (en) 1975-10-14
JPS5751244B2 (en) 1982-11-01
JPS4919395A (en) 1974-02-20
FR2180895A1 (en) 1973-11-30
GB1415772A (en) 1975-11-26
BE798261A (en) 1973-08-16
NL7304871A (en) 1973-10-19

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