Abstract
The chemical stability is an important concern for Nd-Fe-B sintered magnets with respect to their practical applications. In our present study, recycled Nd-Fe-B sintered magnets with excellent magnetic properties have been fabricated from waste Nd-Fe-B sintered magnets as well as their corrosion behavior were investigated and compared with the original waste magnets. We find both magnets to exhibit approximately similar corrosion processes, corrosion rates, and magnetic properties. Moreover, potentiodynamic polarization curves and electrochemical impedance spectroscopy results reveal that both magnets exhibit similar corrosion thermodynamics and kinetics. For comparison, the recycled magnets have a slightly higher rare earth content and more Nd-rich grain boundary phase in their microstructure compared with those of the original waste magnets, but with a negligible influence to the corrosion resistance of the magnets. We conclude that the recycling process has no adverse influence on the performance of these magnets, thus demonstrating the applicability of the recycled Nd-Fe-B sintered magnets.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
