10.4028/www.scientific.net/KEM.682.308

A hydrogen-based treatment, including Hydrogen Decrepitation(HD) and Hydrogen Disproportionation-Desorption-Recombination(HDDR), was used as part of a recycling procedure for scrap neodymium-iron-boron magnets. Chemical methods of removing nickel coating out of magnets were tested, however ineffecti...

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Bibliographic Details
Published in:Key Engineering Materials 2016-02, Vol.682, p.308-313
Main Authors: Szymanski, Mateusz, Michalski, Bartosz, Leonowicz, Marcin, Miazga, Zbigniew
Format: Article
Language:English
Subjects:
Chemical composition
Hydrogen
Magnetic properties
Magnets
Microstructure
Nickel coatings
Recycling
Scrap
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Summary:A hydrogen-based treatment, including Hydrogen Decrepitation(HD) and Hydrogen Disproportionation-Desorption-Recombination(HDDR), was used as part of a recycling procedure for scrap neodymium-iron-boron magnets. Chemical methods of removing nickel coating out of magnets were tested, however ineffectively. Powders were obtained from magnets after the HD and were further processed by the HDDR. Finally, material with maximum energy product (BH) sub(max) of 74 kJ/m super(3) was produced. Chemical composition of magnets (MS, EDS), magnetic properties (VSM) and microstructure observations (SEM) were carried out.
ISSN:1013-9826
1662-9795
DOI:10.4028/www.scientific.net/KEM.682.308