GB1344379A - Manufacture of permanent magnetic bodies - Google Patents

Manufacture of permanent magnetic bodies

Info

Publication number
GB1344379A
GB1344379A GB3962571A GB3962571A GB1344379A GB 1344379 A GB1344379 A GB 1344379A GB 3962571 A GB3962571 A GB 3962571A GB 3962571 A GB3962571 A GB 3962571A GB 1344379 A GB1344379 A GB 1344379A
Authority
GB
United Kingdom
Prior art keywords
sintering
sintered
manufacture
aug
permanent magnetic
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
GB3962571A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1344379A publication Critical patent/GB1344379A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • 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

Abstract

1344379 Sintered anisotropic magnets PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES Ltd 24 Aug 1971 [27 Aug 1970 24 Oct 1970 and 14 Nov 1970] 39625/71 Heading C7D Sintered anisotropic magnets of the type M-R contains M 5 R, where M is Co with or without Fe, Ni and Cu, and R is one or more of the rare earths, Y and Th, are made by magnetically orienting the powder and then sintering the pressed compact above the critical temperature at which magnetic ageing occurs. Sintering is effected in an evacuated enclosure or a continuously evacuated enclosure and the critical sintering temperatures are 1065‹C for Co-Sm; 975‹C for Co-La Ce; 1060‹C for Co-Pr Sm. The sintered magnets may be heat treated between 800‹C and the sintering temperature or from 50- 300‹C to increase the coercivity.
GB3962571A 1970-08-27 1971-08-24 Manufacture of permanent magnetic bodies Expired GB1344379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7012667A NL7012667A (en) 1970-08-27 1970-08-27

Publications (1)

Publication Number Publication Date
GB1344379A true GB1344379A (en) 1974-01-23

Family

ID=19810861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3962571A Expired GB1344379A (en) 1970-08-27 1971-08-24 Manufacture of permanent magnetic bodies

Country Status (3)

Country Link
AU (1) AU3270971A (en)
GB (1) GB1344379A (en)
NL (1) NL7012667A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836867A (en) * 1986-06-26 1989-06-06 Research Development Corporation Anisotropic rare earth magnet material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836867A (en) * 1986-06-26 1989-06-06 Research Development Corporation Anisotropic rare earth magnet material
US4933059A (en) * 1986-06-26 1990-06-12 Research Development Corporation Of Japan Process for preparing anisotropic rare earth magnet material

Also Published As

Publication number Publication date
AU3270971A (en) 1973-03-01
NL7012667A (en) 1972-02-29

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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