EP 0157329 A3 19870616 - RARE EARTH-CONTAINING MAGNETS
Title (en)
RARE EARTH-CONTAINING MAGNETS
Publication
Application
Priority
- US 59527784 A 19840330
- US 59529084 A 19840330
Abstract (en)
[origin: EP0157329A2] Compositions for the production of rare earth-ferromagnetic-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 particulate refractory oxide, carbide, or nitride additive. Permanent magnets are prepared by mixing the components, aligning the mixture in a magnetic field, pressing and sintering. The refractory material inhibits grain growth in the second phase during sintering, improving the magnetic properties of the major phase.
IPC 1-7
IPC 8 full level
H01F 1/055 (2006.01)
CPC (source: EP)
H01F 1/0557 (2013.01)
Citation (search report)
- [X] 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
- [A] 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
- [AD] 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"
- [XP] 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"
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 85103515 A 19850325