EP 0255939 A3 19890531 - RARE EARTH MAGNET AND RARE EARTH MAGNET ALLOY POWDER HAVING HIGH CORROSION RESISTANCE
Title (en)
RARE EARTH MAGNET AND RARE EARTH MAGNET ALLOY POWDER HAVING HIGH CORROSION RESISTANCE
Publication
Application
Priority
- JP 18299886 A 19860804
- US 90173686 A 19860829
Abstract (en)
[origin: EP0255939A2] An (Fe,Co)-B-R tetragonal type magnet and magnet alloy powder having a high corrosion resistance, which have a boundary phase stabilized by Co and Al against corrosion, and which consist essentially of: 0.2 - 3.0 at% Dy and 12 - 17 at% of the sum of Nd and Dy; 5 - 10 at% B; 0.5 - 13 at% Co; 0.5 - 4 at% Al; and the balance being at least 65 at% Fe. 0.1 - 1.0 at% of Ti and/or Nb may be present. The alloy powders can be stabilized.
IPC 1-7
IPC 8 full level
H01F 1/057 (2006.01)
CPC (source: EP)
H01F 1/0571 (2013.01); H01F 1/0572 (2013.01); H01F 1/0577 (2013.01)
Citation (search report)
- [A] EP 0134304 A1 19850320 - SUMITOMO SPEC METALS [JP]
- [XP] EP 0216254 A1 19870401 - TOSHIBA KK [JP]
- [E] EP 0237416 A1 19870916 - SHINETSU CHEMICAL CO [JP]
- PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 209 (E-421)[2265], July 22, 1986; & JP-A-61 048 904 (HITACHI METALS LTD) (10-03-1986)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0255939 A2 19880217; EP 0255939 A3 19890531; EP 0255939 B1 19930728; CA 1336866 C 19950905; CN 1051865 C 20000426; CN 87106209 A 19880427; DE 3786719 D1 19930902; DE 3786719 T2 19931209
DOCDB simple family (application)
EP 87111257 A 19870804; CA 543678 A 19870804; CN 87106209 A 19870804; DE 3786719 T 19870804