The Effect of Niobium and Boron Content on Magnetic Properties and Corrosion Resistance of Pr-Fe-Co-B-Nb HD Magnets

Abstract:

The hydrogenation decrepitation process was employed to produce sintered magnets using a mixture of two alloys. The effect of niobium and boron content on the magnetic properties of Pr14FebalCo16BxNby-type sintered magnets was studied. Niobium and boron have a significant effect on the magnetic behavior of these permanent magnets. The optimum amount of boron was 6 at% and niobium should be kept below to 0.50 at%. The squareness factor (0.90) has been improved considerably and good overall magnetic properties (Br=1320 mT, iHc=700 kAm-1 and (BH)max=315 kJm-3) have been achieved for the sintered magnets prepared from the Pr14Fe63.85Co16B6Nb0.15 alloy.

• Periodical: Materials Science Forum (Volumes 591-593)
• Pages: 96-101
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.591-593.96
• Online since: August 2008
• Authors: J.D. Angelo, C.C. Motta, L. P. Barbosa, Hidetoshi Takiishi, Isolda Costa, R.N. Faria
• Keywords: Hydrides, Magnetic Material, Magnetic Property, Pr-Based Alloys

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