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GB1392915A - Method of manufacturing permanent magnets from a cast cobalt samarium alloy - Google Patents

Method of manufacturing permanent magnets from a cast cobalt samarium alloy

Info

Publication number
GB1392915A
GB1392915A GB1877873A GB1877873A GB1392915A GB 1392915 A GB1392915 A GB 1392915A GB 1877873 A GB1877873 A GB 1877873A GB 1877873 A GB1877873 A GB 1877873A GB 1392915 A GB1392915 A GB 1392915A
Authority
GB
United Kingdom
Prior art keywords
alloy
compact
annealing
permanent magnets
presintering
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
GB1877873A
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.)
SERMAG
Original Assignee
SERMAG
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 SERMAG filed Critical SERMAG
Publication of GB1392915A publication Critical patent/GB1392915A/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

1392915 Sintered samarium-cobalt permanent magnets SOC D'ETUDES ET DE RECHERCHES MAGNETIQUES 18 April 1973 [2 May 1972] 18778/73 Heading C7D Sintered Sm-Co magnets such as SmCO 5 and Sm 2 CO 7 are produced by compacting the powdered alloy in a magnetic field presintering the compact at 600-1000‹C, sintering e.g. at 1050-1150‹C, annealing e.g. at 900‹C for 5-48 hours and then quenching the compact e.g. in water, from the annealing temperature and this increases the coercivity of the magnet. The Sm-CO alloy preferably contains 34-42% Sm and is produced by heating Co to 1500‹C, cooling to 1100‹C and adding the Sm. The alloy is crushed to 4 micron and may be mixed with a lubricant prior to compacting at 2T/cm2 in a magnetic field of 10-15K oersteds parallel to the direction of pressing. Presintering, sintering and annealing are carried out under He or A and prior to presintering and annealing the compact is coated with a Sm alloy having a higher melting point than the alloy compact.
GB1877873A 1972-05-02 1973-04-18 Method of manufacturing permanent magnets from a cast cobalt samarium alloy Expired GB1392915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7215499A FR2182635B1 (en) 1972-05-02 1972-05-02

Publications (1)

Publication Number Publication Date
GB1392915A true GB1392915A (en) 1975-05-07

Family

ID=9097820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1877873A Expired GB1392915A (en) 1972-05-02 1973-04-18 Method of manufacturing permanent magnets from a cast cobalt samarium alloy

Country Status (7)

Country Link
US (1) US3844851A (en)
CH (1) CH573653A5 (en)
DE (1) DE2320122C2 (en)
FR (1) FR2182635B1 (en)
GB (1) GB1392915A (en)
IT (1) IT993556B (en)
NL (1) NL182847C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104851543A (en) * 2015-05-21 2015-08-19 唐海峰 Preparing method of anticorrosion samarium cobalt-based permanent magnet material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2295130A1 (en) * 1974-08-27 1976-07-16 Aimants Ugimag Sa COMPOSITION FOR PERMANENT MAGNETS OF THE "RARE-EARTH - TRANSITION METALS" FAMILY AND METHOD OF MANUFACTURING SUCH A MAGNET
US7338566B2 (en) * 2001-11-09 2008-03-04 Santoku Corporation Alloy for sm-co based magnet, method for production thereof, sintered magnet and bonded magnet
CN114597043A (en) * 2022-02-11 2022-06-07 杭州智宇磁业科技有限公司 Preparation method of cerium-containing samarium cobalt permanent magnet material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6700998A (en) * 1967-01-21 1968-07-22
CH515763A (en) * 1969-07-10 1971-11-30 Bbc Brown Boveri & Cie Process for the production of permanent magnets
GB1347764A (en) * 1970-04-30 1974-02-27 Gen Electric Heat-aged sintered cobalt-rare earth intermetallic product and process
DE2142110B2 (en) * 1970-08-27 1976-06-24 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) PROCESS FOR MAKING A BODY WITH ANISOTROPIC PERMANENT MAGNETIC PROPERTIES FROM A CO DEEP 5 R COMPOUND
US3684593A (en) * 1970-11-02 1972-08-15 Gen Electric Heat-aged sintered cobalt-rare earth intermetallic product and process
FR2120303A5 (en) * 1970-12-29 1972-08-18 Etu Rech Magnetiqu
US3755007A (en) * 1971-04-01 1973-08-28 Gen Electric Stabilized permanent magnet comprising a sintered and quenched body of compacted cobalt-rare earth particles
US3748193A (en) * 1971-08-16 1973-07-24 Gen Electric Rare earth intermetallic compounds by a calcium hydride reduction diffusion process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104851543A (en) * 2015-05-21 2015-08-19 唐海峰 Preparing method of anticorrosion samarium cobalt-based permanent magnet material

Also Published As

Publication number Publication date
CH573653A5 (en) 1976-03-15
US3844851A (en) 1974-10-29
NL182847C (en) 1988-05-16
FR2182635A1 (en) 1973-12-14
DE2320122C2 (en) 1983-09-29
FR2182635B1 (en) 1978-03-03
NL7305987A (en) 1973-11-06
DE2320122A1 (en) 1973-11-22
NL182847B (en) 1987-12-16
IT993556B (en) 1975-09-30

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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