DEVELOPMENT OF ECONOMIC PRODUCTION TECHNIQUES OF HIGH PERFORMANCE RE-MAGNETSFOR MASS APPLICATIONS

Projektinformationen

ID Finanzhilfevereinbarung: BREU0156

Projekt abgeschlossen

Startdatum 1 Dezember 1990

Enddatum 30 November 1993

Finanziert unter

• Specific research and technological development programme (EEC) in the fields of industrial manufacturing technologies and advanced materials applications (BRITE/EURAM), 1989-1992

Gesamtkosten

Keine Daten

EU-Beitrag

Keine Daten

Koordiniert durch

VACUUMSCHMELZE GMBH
Germany

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Verwertbare Ergebnisse

Mechanical alloying of neodymium iron boron alloys

Within the project an economic processing route for the production of neodymium iron boron powders by mechanical alloying has been developed. After an appropriate heat treatment the remanent polarization (related to the theoretical density) and the coercivity amount to 0.75 T and 12 kA/cm. Such alloy powders are appropriate for the manufacture of polymer bonded magnets with a remanent polarization of 0.5 T and a coercivity of 11.5 kA/cm. The maximum energy density amounts to 40 kJm{-3}. By hot pressing and subsequent hot deformation compact anisotropic neodymium iron boron magnets with a remanent polarization of 1.28 T and coercivities of about 8 kA/cm could be prepared on a laboratory scale. Unannealed mechanically alloyed neodymium iron boron powders are also promising for compaction by hot rolling or hot extrusion, respectively.