GB1262594A - Method of reducing the coercive force of permanent-magnetic material - Google Patents

Method of reducing the coercive force of permanent-magnetic material

Info

Publication number
GB1262594A
GB1262594A GB01666/70A GB1166670A GB1262594A GB 1262594 A GB1262594 A GB 1262594A GB 01666/70 A GB01666/70 A GB 01666/70A GB 1166670 A GB1166670 A GB 1166670A GB 1262594 A GB1262594 A GB 1262594A
Authority
GB
United Kingdom
Prior art keywords
permanent
reducing
magnetic material
march
coercive force
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
GB01666/70A
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 GB1262594A publication Critical patent/GB1262594A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/023—Hydrogen absorption
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • 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
    • 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

Landscapes

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

Abstract

1,262,594. Magnetic compositions. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 11 March, 1970 [14 March, 1969], No. 11666/70. Heading H1H. [Also in Division C1] Magnetic bodies are obtained by compacting, before, after or during magnetization, a powdered rare-earth-cobalt compound of the formula M 5 R where M=Co or a combination of Co with one or more of Fe, Ni and Cu and R is one, or more lanthanide, yttrium or thorium. The material is reduced in coercivity by application of a pressure of hydrogen gas until it contains at least 0À2 moles per mole of M 5 R before magnetization. ,In an example SmCo 5 is pulverized, orientated in a magnetic field, compressed without a binder to form a block and the block was subjected to a hydrogen pressure of 30 atmospheres, and magnetized.
GB01666/70A 1969-03-14 1970-03-11 Method of reducing the coercive force of permanent-magnetic material Expired GB1262594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6903931A NL6903931A (en) 1969-03-14 1969-03-14

Publications (1)

Publication Number Publication Date
GB1262594A true GB1262594A (en) 1972-02-02

Family

ID=19806410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB01666/70A Expired GB1262594A (en) 1969-03-14 1970-03-11 Method of reducing the coercive force of permanent-magnetic material

Country Status (11)

Country Link
US (1) US3647574A (en)
AT (1) AT302501B (en)
AU (1) AU1251670A (en)
BE (1) BE747286A (en)
BR (1) BR7017383D0 (en)
CA (1) CA918044A (en)
CH (1) CH524876A (en)
ES (1) ES377414A1 (en)
FR (1) FR2038898A5 (en)
GB (1) GB1262594A (en)
NL (1) NL6903931A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1554384A (en) * 1977-04-15 1979-10-17 Magnetic Polymers Ltd Rare earth metal alloy magnets

Also Published As

Publication number Publication date
BE747286A (en) 1970-09-14
ES377414A1 (en) 1972-07-01
FR2038898A5 (en) 1971-01-08
DE2008191B2 (en) 1977-06-30
DE2008191A1 (en) 1970-10-01
US3647574A (en) 1972-03-07
NL6903931A (en) 1970-09-16
AT302501B (en) 1972-10-25
AU1251670A (en) 1971-09-16
CA918044A (en) 1973-01-02
CH524876A (en) 1972-06-30
BR7017383D0 (en) 1973-01-16

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