EP0260870A3 - Polymeric bonded metal magnet with corrosion resistant metal particles - Google Patents

Polymeric bonded metal magnet with corrosion resistant metal particles Download PDF

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Publication number
EP0260870A3
EP0260870A3 EP87307965A EP87307965A EP0260870A3 EP 0260870 A3 EP0260870 A3 EP 0260870A3 EP 87307965 A EP87307965 A EP 87307965A EP 87307965 A EP87307965 A EP 87307965A EP 0260870 A3 EP0260870 A3 EP 0260870A3
Authority
EP
European Patent Office
Prior art keywords
corrosion resistant
magnet
metal particles
polymeric
polymeric bonded
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.)
Withdrawn
Application number
EP87307965A
Other languages
German (de)
French (fr)
Other versions
EP0260870A2 (en
Inventor
David M. Hopstock
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0260870A2 publication Critical patent/EP0260870A2/en
Publication of EP0260870A3 publication Critical patent/EP0260870A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • 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
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0572—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B 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
    • H01F1/047—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
    • H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
    • 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
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

A highly stable, non-pyrophoric, highly corrosion resistant magnetic powder provided by treating magnetic particles with a solution containing chromate or dichromate ions and polymeric magnets containing the powder.
EP87307965A 1986-09-12 1987-09-09 Polymeric bonded metal magnet with corrosion resistant metal particles Withdrawn EP0260870A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90681986A 1986-09-12 1986-09-12
US906819 1986-09-12

Publications (2)

Publication Number Publication Date
EP0260870A2 EP0260870A2 (en) 1988-03-23
EP0260870A3 true EP0260870A3 (en) 1989-04-19

Family

ID=25423037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87307965A Withdrawn EP0260870A3 (en) 1986-09-12 1987-09-09 Polymeric bonded metal magnet with corrosion resistant metal particles

Country Status (3)

Country Link
EP (1) EP0260870A3 (en)
JP (1) JPS6376801A (en)
KR (1) KR880004508A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5173206A (en) * 1987-12-14 1992-12-22 The B. F. Goodrich Company Passivated rare earth magnet or magnetic material compositions
US5278377A (en) * 1991-11-27 1994-01-11 Minnesota Mining And Manufacturing Company Electromagnetic radiation susceptor material employing ferromagnetic amorphous alloy particles
US6468678B1 (en) 1994-11-17 2002-10-22 3M Innovative Properties Company Conformable magnetic articles for use with traffic bearing surfaces methods of making same systems including same and methods of use
DK0818126T3 (en) * 1995-03-29 2000-09-11 Minnesota Mining & Mfg Composite material that absorbs electromagnetic effect
US5764060A (en) * 1996-03-11 1998-06-09 Minnesota Mining And Manufacturing Company Guidance system for a moving person
US6217252B1 (en) 1998-08-11 2001-04-17 3M Innovative Properties Company Wear-resistant transportation surface marking method and materials
JP3882545B2 (en) * 2000-11-13 2007-02-21 住友金属鉱山株式会社 High weather-resistant magnet powder and magnet using the same
US20030123930A1 (en) 2001-12-31 2003-07-03 Jacobs Gregory F. Matrix element magnetic pavement marker and method of making same
DE102015223542A1 (en) * 2015-11-27 2017-06-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for enriching an element at the grain boundaries of a magnetic two or more phase system
CN109982791B (en) * 2016-11-28 2022-02-22 国立大学法人东北大学 Rare earth iron-nitrogen-based magnetic powder and method for producing same
JP6963251B2 (en) * 2016-11-28 2021-11-05 国立大学法人東北大学 Rare earth iron nitrogen-based magnetic powder
JP6865437B2 (en) * 2017-08-18 2021-04-28 国立大学法人東北大学 Manufacturing method of magnet alloy powder with film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932293A (en) * 1972-05-22 1976-01-13 Minnesota Mining And Manufacturing Company Metallic ferromagnetic particles for use in environmentally stable magnetic recording media
EP0043921A1 (en) * 1980-07-15 1982-01-20 BASF Aktiengesellschaft Ferromagnetic metal particles essentially consisting of iron with surface coating, process for their manufacture as well as their use in making magnetic-recording media
EP0190461A2 (en) * 1984-12-24 1986-08-13 Sumitomo Special Metals Co., Ltd. Process for producing permanent magnets and permanent magnet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932293A (en) * 1972-05-22 1976-01-13 Minnesota Mining And Manufacturing Company Metallic ferromagnetic particles for use in environmentally stable magnetic recording media
EP0043921A1 (en) * 1980-07-15 1982-01-20 BASF Aktiengesellschaft Ferromagnetic metal particles essentially consisting of iron with surface coating, process for their manufacture as well as their use in making magnetic-recording media
EP0190461A2 (en) * 1984-12-24 1986-08-13 Sumitomo Special Metals Co., Ltd. Process for producing permanent magnets and permanent magnet

Also Published As

Publication number Publication date
EP0260870A2 (en) 1988-03-23
JPS6376801A (en) 1988-04-07
KR880004508A (en) 1988-06-04

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Inventor name: HOPSTOCK,DAVID M.