Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 28: Magnetic Materials

MA 28.6: Talk

Wednesday, March 13, 2013, 16:15–16:30, H22

Partial substitution of Nd in FeNdB permanent magnets by economic rare earth metals — •Dagmar Goll¹, Ralf Löffler¹, Arne Huber², and Gerhard Schneider¹ — ¹Hochschule Aalen, Institut für Materialforschung, Aalen — ²Robert Bosch GmbH, Gerlingen-Schillerhöhe

High-performance permanent magnets like Fe-Nd-B sintered magnets are very promising for high-power motor and generator applications in resource efficient mobility and renewable energy. However, the associated increasing demand for intermetallic rare earth (RE) and transition metal (TM) compounds recently gets somewhat abated due to the dependence on rare earth metal raw materials from China. Partial substitution of Nd by economic RE metals like Ce, La or Y may result in more cost-efficient magnets. To evaluate the optimum conditions for realizing cost-efficient high-performance magnets the intrinsic magnetic properties (anisotropy constant K₁, saturation polarization J_s) of as-cast Fe₁₄(Nd_{1− x}RE_x)₂B are determined from Kerr microscopy investigations and magnetometry measurements of the corresponding hysteresis loops (project supported by BMBF).