Thermal Aging of Reprocessed NdFeB Powders

Abstract:

Microstructural and magnetic properties of thermal aged NdFeB-based powders, recycled by means of the HDDR process, are studied. The time aging causes a reduction of the remanent magnetic moment per unit mass and intrinsic coercivity of the magnetic powders. On the other hand, it has been verified an increase of the magnetic polarization at µ₀H = 2 T after aging during 16 hours. The oxygen concentration is superior in the grain boundary region (Nd-rich) compared to that verified in the hard magnetic phase.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 181-185
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.181
• Online since: August 2012
• Authors: E.A. Périgo, Fernando José Gomes Landgraf
• Keywords: NdFeB, Recycling, Thermal Aging

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