EP 0707739 B1 19970409 - COBALT/RARE EARTH TYPE MAGNETIC POWDERS CONTAINING FLUORINE AND CORRESPONDING DENSIFIED PERMANENT MAGNETS AND PROCESS FOR THE PREPARATION THEREOF
Title (en)
COBALT/RARE EARTH TYPE MAGNETIC POWDERS CONTAINING FLUORINE AND CORRESPONDING DENSIFIED PERMANENT MAGNETS AND PROCESS FOR THE PREPARATION THEREOF
Title (de)
EIN SELTENER ERD-COBALTTYP FLUORENTHALTENDER MAGNETPUDER UND VERDICHTETE DAUERMAGNETEN DARAUS UND DEREN HERSTELLUNGSVERFAHREN
Title (fr)
POUDRES MAGNETIQUES DE TYPE TERRES RARES-COBALT CONTENANT DU FLUOR ET AIMANTS PERMANENTS DENSIFIES CORRESPONDANTS ET PROCEDE DE LEUR PREPARATION
Publication
Application
Priority
- FR 9400838 W 19940707
- FR 9308644 A 19930708
Abstract (en)
[origin: WO9502252A1] This invention pertains to the addition of fluorine to magnetic powders and to sintered permanent magnets of the Sm - Co family in order to enhance their atmospheric corrosion and oxydation resistance. These powders and magnets contain from 600 to 3000 ppm of fluorine, which is introduced in gaseous form during grinding, and/or homogenizing of said powders following grinding.
IPC 1-7
IPC 8 full level
B22F 9/04 (2006.01); C23C 8/08 (2006.01); H01F 1/055 (2006.01)
CPC (source: EP)
B22F 9/04 (2013.01); C23C 8/08 (2013.01); H01F 1/0552 (2013.01); H01F 1/0557 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
WO 9502252 A1 19950119; DE 69402551 D1 19970515; DE 69402551 T2 19970911; EP 0707739 A1 19960424; EP 0707739 B1 19970409; FR 2707192 A1 19950113; FR 2707192 B1 19950811
DOCDB simple family (application)
FR 9400838 W 19940707; DE 69402551 T 19940707; EP 94921696 A 19940707; FR 9308644 A 19930708