The sintering mechanism of fully dense and highly coercive Nd-Fe-B magnets from the recycled HDDR powders reprocessed by spark plasma sintering

The sintering mechanism of fully dense and highly coercive Nd-Fe-B magnets from the recycled HDDR powders reprocessed by spark plasma sintering

The goal of this study was to justify the reprocessing of recycled HDDR Nd-Fe-B powders with spark plasma sintering (SPS) and to investigate the dependence of the final magnetic properties on SPS and thermal treatment. The initial recycled HDDR powder of the composition Nd13.4Dy0.6Fe78.6B6.1Nb0.4Al0...

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Veröffentlicht in:Journal of alloys and compounds 2019-02, Vol.774, p.1195-1206
Hauptverfasser: Ikram, Awais, Mehmood, M. Farhan, Podlogar, Mateja, Eldosouky, Anas, Sheridan, Richard Stuart, Awais, Muhammad, Walton, Allan, Maček Kržmanc, Marjeta, Tomse, Tomaz, Kobe, Spomenka, Sturm, Saso, Žužek Rožman, Kristina
Format: Artikel
Sprache:eng
Schlagworte:
Bulk density
Coercivity
Dependence
Ferrous alloys
Grain boundaries
Grain growth
Grain size distribution
HDDR
Heat treatment
Magnetic materials
Magnetic properties
Magnetism
Magnets
Nanocrystalline
Nd2Fe14B
Neodymium
Particle size distribution
Permanent magnets
Plasma
Pressure
Rare earth
Recycling
Reprocessing
Residual stress
Scrap
Sintering
Spark plasma sintering
Stress relaxation
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Beschreibung
Zusammenfassung:The goal of this study was to justify the reprocessing of recycled HDDR Nd-Fe-B powders with spark plasma sintering (SPS) and to investigate the dependence of the final magnetic properties on SPS and thermal treatment. The initial recycled HDDR powder of the composition Nd13.4Dy0.6Fe78.6B6.1Nb0.4Al0.7 with 4760 ppm O2 content, coercivity (HCi) = 830 kA/m, and large particle size distribution
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.09.322