Spark Plasma Texturing in the Direct Recycling of Hot-Deformed Nd-Fe-B Scrap [* Cross-Reference *]

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Monica Keszler; Martin Krengel; Felix Großwendt; Doris Sebold; Olivier Guillon; Sebastian Weber; Martin Bram, 2026, "Spark Plasma Texturing in the Direct Recycling of Hot-Deformed Nd-Fe-B Scrap [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.TS0AKF, LIST Open Repository, V1
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Description
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. (2026-06-26)
***This entry has been automatically imported via OpenAlex by LIST harvest scripts. Please refer to https://doi.org/10.3390/recycling11070115 for the original and latest version of the publication*** (2026-07-01)
Subject Engineering; Physics
Keyword Spark plasma sintering, Microstructure, Magnet, Scrap, Sintering, Neodymium magnet, Ingot
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