| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Walton, Allan
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Development of anisotropic Nd-Fe-B powder from isotropic gas atomized powdercitations
- 2022Limitations in the grain boundary processing of the recycled HDDR Nd-Fe-B systemcitations
- 2020Limitations in grain boundary processing of the recycled HDDR Nd-Fe-B systemcitations
- 2020Recycling of bonded NdFeB permanent magnets using ionic liquidscitations
- 2020The extraction of NdFeB magnets from automotive scrap rotors using hydrogencitations
- 2019Coercivity increase of the recycled HDDR Nd-Fe-B powders doped with DyF3 and processed via Spark Plasma Sintering & the effect of thermal treatmentscitations
- 2017Isotropic NdFeB hard magnets
- 2017Metal Injection Moulding for the Production of Recycled Rare Earth Magnets
- 2016REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Reviewcitations
- 2016The Hydrogen Ductilisation Process (HyDP) for shaping NdFeB magnetscitations
- 2016Metal Injection Moulding of NdFeB Based on Recycled Powders
- 2016Metal Injection Moulding of NdFeB based on Recycled Powders
- 2016The development of microstructure during hydrogenation–disproportionation–desorption–recombination treatment of sintered neodymium-iron-boron-type magnetscitations
- 2016Novel "Flash Spark Plasma Sintering" method for the rapid fabrication of nanostructured and anisotropic rare-earth lean permanent magnetic materials
- 2014The Effect of Ni Impurities on HDDR Processing of Scrap Sintered NdFeB Magnets
- 2003Hydrogenation properties of nanocrystalline Mg- and Mg₂Ni-based compounds modified with platinum group metals (PGMs)
- 2002Low temperature hydrogenation properties of platinum group metal treated, nickel metal hydride electrode alloycitations
Places of action
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article
Limitations in grain boundary processing of the recycled HDDR Nd-Fe-B system
Abstract
Fully dense spark plasma sintered recycled and fresh HDDR Nd-Fe-B nanocrystalline 16 bulk magnets are processed by surface grain boundary diffusion (GBD) treatment to further 17 augment the coercivity and investigate the underlying diffusion mechanism. The fully dense SPS 18 processed HDDR based magnets were placed in a crucible with varying the eutectic alloys Pr68Cu32 19 and Dy70Cu30 from 2 – 20 wt.% as direct diffusion source above the ternary transition temperature 20 for GBD processing followed by secondary annealing. The changes in mass gain was analysed and 21 weighted against the magnetic properties. For the recycled magnet, the coercivity (HCi) values 22 obtained after optimal GBDP yielded ~ 60% higher than the starting recycled HDDR powder and 23 17.5% higher than the SPS-ed processed magnets. The fresh MF-15P HDDR Nd-Fe-B based magnets 24 gained 25 – 36% higher coercivities with Pr-Cu GBDP. The FEG-SEM investigation provided insight 25 on the diffusion depth and EDXS analysis indicated the changes in matrix and intergranular phase 26 composition within the diffusion zone. The mechanism of surface to grain boundary diffusion and 27 the limitations to thorough grain boundary diffusion in the HDDR Nd-Fe-B based bulk magnets are 28 detailed in this study.