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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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Sheridan, Richard
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Strip Casting of Sm2TM17-Type Alloys for Production of the Metastable SmTM7 Phase
- 2024Development of anisotropic Nd-Fe-B powder from isotropic gas atomized powdercitations
- 2023Strip Casting of Sm2TM17-type Alloys for Production of the Metastable SmTM7 Phase
- 2023On the origin of cracking in laser powder bed fusion processed LaCe(Fe,Mn,Si)13, and the impact of post-processingcitations
- 2023The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigerationcitations
- 2022The effect of grain size on the internal oxidation of Sm2Co17-type permanent magnetscitations
- 2021Microstructure-magnetic shielding development in additively manufactured Ni-Fe-Mo soft magnet alloy in the as fabricated and post-processed conditionscitations
- 2020Limitations in grain boundary processing of the recycled HDDR Nd-Fe-B systemcitations
- 2020Magnetic shielding promotion via the control of magnetic anisotropy and thermal Post processing in laser powder bed fusion processed NiFeMo-based soft magnetcitations
- 2020The extraction of NdFeB magnets from automotive scrap rotors using hydrogencitations
- 2019Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processingcitations
- 2019Coercivity increase of the recycled HDDR Nd-Fe-B powders doped with DyF3 and processed via Spark Plasma Sintering & the effect of thermal treatmentscitations
- 2016REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Reviewcitations
- 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
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document
The Effect of Ni Impurities on HDDR Processing of Scrap Sintered NdFeB Magnets
Abstract
The Magnetic Materials Group (MMG) at the University of Birmingham have demonstrated previously that it is possible to use hydrogen to extract sintered NdFeB magnets from electronic waste [1] and to re-use the extracted alloy powders to form both sintered and resin bonded magnets [2,3,4]. One of the challenges in using scrap NdFeB magnets is that this material is likely to contain a number of impurities, for example, nickel from the protective coating. In this paper the effects of Ni contamination on the magnetic properties of HDDR NdFeB powders has been investigated. Nickel powder was blended with hydrogenated NdFeB powder in varying fractions from 1wt%-5wt% prior to processing using a modified version of the HDDR processing route developed by Sheridan et al (2012)[2] to produce anisotropic material. It has been shown that powders can be produced from voice coil magnets (VCM), which exhibit significant anisotropy and the anisotropy of the HDDR powder was shown to diminish with increasing Ni content. The Ni additions have been shown to lower the pressure at which the disproportionation reaction starts and ends, which, under the current conditions, could lead to over processing of the material.