[go: up one dir, main page]

GB1347764A - Heat-aged sintered cobalt-rare earth intermetallic product and process - Google Patents

Heat-aged sintered cobalt-rare earth intermetallic product and process

Info

Publication number
GB1347764A
GB1347764A GB1087971*[A GB1087971A GB1347764A GB 1347764 A GB1347764 A GB 1347764A GB 1087971 A GB1087971 A GB 1087971A GB 1347764 A GB1347764 A GB 1347764A
Authority
GB
United Kingdom
Prior art keywords
rare earth
phase
aged
richer
product
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
GB1087971*[A
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 GB1347764A publication Critical patent/GB1347764A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • 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)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

1347764 Cobalt - rare earth alloys GENERAL ELECTRIC CO 22 April 1971 [30 April 1970 2 Nov 1970] 10879/71 Headings C7A, C7D A sintered cobalt-rare earth intermetallic product ranges in composition from a single solid Co 5 R phase to that composed of Co 5 R phase and a second phase of Co-R in amount up to 30 by weight per cent of the product and richer in rare earth metal than Co 5 R, the sintered product having been heat-aged at a temperature within 400‹ C below the sintering temperature so as to precipitate a Co-R phase richer in rare earth metal than Co 5 R in amount to increase the intrinsic coercive force and/or normal coercive force by at least 10%, R being a rare earth metal of the lanthanide series or yttruim, or a mixture thereof. In examples powders of base alloys containing varying amounts from 66 to 68À2 by weight per cent of Co and the remainder Sm or mixture of Sm with other rare earths were mixed with Co-R alloy powders richer in rare earth content, magnetically aligned in a magnetic field, pressed, sintered at temperatures of 1075‹C for 1 hour or 1100‹C for up to 20 hours and aged at temperature of 900‹C - 1000‹C for up to 17“ hours.
GB1087971*[A 1970-04-30 1971-04-22 Heat-aged sintered cobalt-rare earth intermetallic product and process Expired GB1347764A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3331570A 1970-04-30 1970-04-30
US8628870A 1970-11-02 1970-11-02

Publications (1)

Publication Number Publication Date
GB1347764A true GB1347764A (en) 1974-02-27

Family

ID=26709539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1087971*[A Expired GB1347764A (en) 1970-04-30 1971-04-22 Heat-aged sintered cobalt-rare earth intermetallic product and process

Country Status (5)

Country Link
JP (1) JPS5614736B1 (en)
DE (1) DE2121452B2 (en)
FR (1) FR2092117B1 (en)
GB (1) GB1347764A (en)
NL (1) NL175932C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232165A (en) * 1989-03-22 1990-12-05 Cookson Group Plc Magnetic compositions
US20120139388A1 (en) * 2010-03-04 2012-06-07 Tdk Corporation Rare earth sintered magnet and motor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2182635B1 (en) * 1972-05-02 1978-03-03 Sermag
CH616777A5 (en) * 1975-09-23 1980-04-15 Bbc Brown Boveri & Cie

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424578A (en) * 1967-06-05 1969-01-28 Us Air Force Method of producing permanent magnets of rare earth metals containing co,or mixtures of co,fe and mn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232165A (en) * 1989-03-22 1990-12-05 Cookson Group Plc Magnetic compositions
US20120139388A1 (en) * 2010-03-04 2012-06-07 Tdk Corporation Rare earth sintered magnet and motor
US9154004B2 (en) * 2010-03-04 2015-10-06 Tdk Corporation Rare earth sintered magnet and motor

Also Published As

Publication number Publication date
DE2121452A1 (en) 1971-11-25
DE2121452B2 (en) 1980-07-03
NL7105960A (en) 1971-11-02
NL175932C (en) 1985-01-16
FR2092117B1 (en) 1974-03-08
JPS5614736B1 (en) 1981-04-06
FR2092117A1 (en) 1972-01-21
NL175932B (en) 1984-08-16

Similar Documents

Publication Publication Date Title
Rossi et al. Lattice parameters of some ThCu2Si2-type phases in ternary alloys of rare earths with cobalt (or iron) and silicon (or germanium)
GB1187853A (en) Improvements relating to Permanent Magnets.
GB1343536A (en) Liquid sintered cobalt-rare earth intermetallic product
DE69219753D1 (en) Rare earth iron boron alloy powder for permanent magnets
GB1436915A (en) Copper base alloys
GB1347764A (en) Heat-aged sintered cobalt-rare earth intermetallic product and process
GB1347763A (en) Sintering cobalt-rare earth intermetallic product and process using solid sintering additive
US4857118A (en) Method of manufacturing a permanent magnet
GB1298943A (en) Nickel-chromium-cobalt alloys
IL31907A (en) Permanent magnetic materials
US3695945A (en) Method of producing a sintered cobalt-rare earth intermetallic product
US3821035A (en) Sintered cobalt-neodymium-samarium intermetallic product and permanent magnets produced therefrom
GB1369546A (en) Heat treatment process for producing stabilized permanent magnet materials
KR920700818A (en) Magnetic Alloy Composition and Permanent Magnets
US3970484A (en) Sintering methods for cobalt-rare earth alloys
GB2086422A (en) Alloy for the manufacture of a permanent magnet
GB1318965A (en) Rare earth intermetallic compounds by a reduction-diffusion process
JPS5567110A (en) Intermetallic compound magnet
US4090892A (en) Permanent magnetic material which contains rare earth metals, especially neodymium, and cobalt process for its production and its use
GB1332055A (en) Sintered intermetallic product and magnets produced therefrom
GB1427445A (en) Cast iron
GB1373019A (en) Cobalt-based sintered permanent magnets
US3919002A (en) Sintered cobalt-rare earth intermetallic product
GB1413216A (en) Magnetic material
GB1380330A (en) Process for the production of permanent-magnetic sintered articles having a ternary cobalt-lanthanoid composition

Legal Events

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