Journal Article

FZJ-2026-03464

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spark Plasma Texturing in the Direct Recycling of Hot-Deformed Nd-Fe-B Scrap

Keszler, M. (Corresponding author)FZJ* ; Krengel, M. ; Grosswendt, F. ; Sebold, D.FZJ* ; Guillon, O.FZJ* ; Weber, S. ; Bram, M.FZJ*

2026
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/recycling11070115  doi:10.34734/FZJ-2026-03464

Abstract: The particular microstructure of hot-deformed Nd-Fe-B magnets leads to difficulties in finding a direct recycling route. In this work, a combination of field-assisted sintering technology/spark plasma sintering (FAST/SPS) and spark plasma texturing (SPT) is used as pre-compaction and deformation techniques, respectively, for the consolidation of crushed, hot-deformed Nd-Fe-B scrap. Field-assisted sintering has the unique advantage of maintaining fine microstructures during material densification, making it an ideal candidate for direct recycling of this material. Recycled magnets, made from 100 wt% crushed magnet scrap, were able to achieve energy products of over 200 kJ m−3 after FAST/SPS pre-compaction and SPT deformation. These recycled magnets could then be smoothed and cut to the size of industrial bar magnets for testing in the motor of a water pump. When tested, the recycled magnets could achieve 95% of the electromotive force compared to industrial standard magnets.

Note: Grant number: BMWE 03EI5009D

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Contributing Institute(s):

1. Plasmaphysik (IFN-1)
2. Werkstoffsynthese und Herstellungsverfahren (IMD-2)

Research Program(s):

1. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2026

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Database coverage:
; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF < 5 ; JCR ; SCOPUS ; Web of Science Core Collection

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