EP0157329A3 - PrCo5-containing magnets - Google Patents

PrCo5-containing magnets Download PDF

Info

Publication number
EP0157329A3
EP0157329A3 EP85103515A EP85103515A EP0157329A3 EP 0157329 A3 EP0157329 A3 EP 0157329A3 EP 85103515 A EP85103515 A EP 85103515A EP 85103515 A EP85103515 A EP 85103515A EP 0157329 A3 EP0157329 A3 EP 0157329A3
Authority
EP
European Patent Office
Prior art keywords
phase
rare earth
prco5
magnets
ferromag
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Withdrawn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
EP85103515A
Other languages
German (de)
French (fr)
Other versions
EP0157329A2 (en
Inventor
Mohammad H. Ghandehari
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.)
Union Oil Company of California
Original Assignee
Union Oil Company of California
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
Priority claimed from US06/595,290 external-priority patent/US4601754A/en
Application filed by Union Oil Company of California filed Critical Union Oil Company of California
Publication of EP0157329A2 publication Critical patent/EP0157329A2/en
Publication of EP0157329A3 publication Critical patent/EP0157329A3/en
Withdrawn legal-status Critical Current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)

Abstract

Compositions for the production of rare earth-ferromag­ netic-metal permanent magnets comprise mixtures of rare earth-ferromagnetic-metal alloy powder and a lesser amount of a powdered second-phase sintering aid, wherein there is added up to about 2 percent by weight of a particu­ late refractory oxide, carbide, or nitride additive. Perma­ nent magnets are prepared by mixing the components, aligning the mixture in a magnetic field, pressing and sin­ tering. The refractory material inhibits grain growth in the second phase during sintering, improving the magnetic properties of the major phase.
EP85103515A 1984-03-30 1985-03-25 PrCo5-containing magnets Withdrawn EP0157329A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US59527784A 1984-03-30 1984-03-30
US595290 1984-03-30
US06/595,290 US4601754A (en) 1984-03-30 1984-03-30 Rare earth-containing magnets
US595277 1996-02-01

Publications (2)

Publication Number Publication Date
EP0157329A2 EP0157329A2 (en) 1985-10-09
EP0157329A3 true EP0157329A3 (en) 1987-06-16

Family

ID=27082214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103515A Withdrawn EP0157329A3 (en) 1984-03-30 1985-03-25 PrCo5-containing magnets

Country Status (1)

Country Link
EP (1) EP0157329A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR880013194A (en) * 1987-04-06 1988-11-30 원본미기재 Permanent magnet and its manufacturing method
CN104700972A (en) * 2013-12-06 2015-06-10 绥中鑫源科技有限公司 High-performance and low-cost anisotropic bonding magnetic powder and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108707A (en) * 1981-12-23 1983-06-28 Tohoku Metal Ind Ltd Rare earth permanent magnet material

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
APPLIED PHYSICS LETTERS, vol. 18, no. 4, 15th February 1971, pages 107-108, New York, US; J. TSUI et al.: "Sintering of PrCo5 permanent magnets" *
CHEMICAL ABSTRACTS, vol. 80, no. 2, 14th January 1974, page 365, abstract no. 8485j, Columbus, Ohio, US; & JP-A-73 00 370 (SUWA SEIKOSHA CO., LTD) 08.01.1973 *
IEEE TRANSACTIONS ON MAGNETICS, vol. MAG-20, no. 5, part 2, September 1984, pages 1611-1613, IEEE, New York, US; M.H. GHANDEHARI et al.: "Magnetic hardening of PrCo5 by oxide additives" *
PATENTS ABSTRACTS OF JAPAN, vol. 7. no. 214 (E-199)[1359], 21st September 1983; & JP-A-58 108 707 (TOUHOKU KINZOKU KOGYO K.K.) 28.06.1983 *

Also Published As

Publication number Publication date
EP0157329A2 (en) 1985-10-09

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18D Application deemed to be withdrawn

Effective date: 19911007

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GHANDEHARI, MOHAMMAD H.