Production of net-shape Mn-Al permanent magnets by electron beam melting

Radulov, I.; Popov, V. V.; Koptyug, Andrey; Maccari, Fernando; Kovalevsky, A. A.; Essel, Shai; Gaßmann, J.; Skokov, Konstantin P.; Bamberger, Μ.

doi:10.1016/j.addma.2019.100787

Cited by 20 publications

(11 citation statements)

References 28 publications

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“…The PBF process can be divided into the heating source. Following commonly used PBF printing techniques are used to investigate the capability to print hard or soft magnets: electron beam melting (EBM) [15], selective laser melting (SLM) [16,17,18,19,20,21], and selective laser sintering (SLS). SLS does not completely melt each powder layer but sinter the particles to retain their original microstructure.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufactured Polymer-Bonded Isotropic NdFeB Magnets by Stereolithography and Their Comparison to Fused Filament Fabricated and Selective Laser Sintered Magnets

Huber

Mitteramskogler²,

Goertler

et al. 2020

Materials

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Magnetic isotropic NdFeB powder is processed by the following additive manufacturing methods: (i) stereolithography (SLA), (ii) fused filament fabrication (FFF), and (iii) selective laser sintering (SLS). For the first time, a stereolithography based method is used to 3D print hard magnetic materials. FFF and SLA use a polymer matrix material as binder, SLS sinters the powder directly. All methods use the same hard magnetic NdFeB powder material. Complex magnets with small feature sizes in a superior surface quality can be printed with SLA. The magnetic properties for the processed samples are investigated and compared. SLA can print magnets with a remanence of 388 mT and a coercivity of 0.923 T. A complex magnetic design for speed wheel sensing applications is presented and printed with all methods.

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Section: Introductionmentioning

confidence: 99%

Additive Manufactured Polymer-Bonded Isotropic NdFeB Magnets by Stereolithography and Their Comparison to Fused Filament Fabricated and Selective Laser Sintered Magnets

Huber

Mitteramskogler²,

Goertler

et al. 2020

Materials

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“…Processing parameters used: layer thickness 100 mm; line offset 100 mm; maximum beam current (EB) 30 mA and average chamber temperature of 830°C. More details about the processing and optimization can be found in [15].…”

Section: Additive Manufacturingmentioning

confidence: 99%

“…The part of the current work devoted on the Additive Manufacturing of MnAl-C magnets by Beam-based Powder Bed technology is a continuation of the work published previously [14] and [15], were ball milled binary Mn-Al alloy was used as a precursor. The samples were printed using a modified ArcamA2 EBM machine and ballmilled Mn-Al-C alloy with particles size of 50-60 mm (see Fig.…”

Section: Beam-based Powder Bed Additive Manufacturingmentioning

confidence: 99%

“…The abrupt increase of the rare earth elements price in 2011, along with the growing demand on permanent magnets, triggered the renewed interest in this material system in the past years [3,4]. This combination of circumstances has motivated many scientists to not only search for novel materials, but also to reinvestigate already know materialsystems like MnAl and work further on the development of new fabrication techniques, involving novel routes of powder metallurgy [5][6][7], hot deformation [8][9][10][11][12] and additive manufacturing [13][14][15][16] which can provide hard magnetic properties for these non-rare-earth relatively cheap permanent magnets [4].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and magnetic properties of Mn-Al-C permanent magnets produced by various techniques

et al. 2021

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Bulk Mn52Al46C2 in τ-phase was prepared by vacuum induction melting and used as precursor for the production bulk permanent magnets by suction casting and hot-extrusion. Part of the precursor alloy was mechanically milled into a τ-phase powder and used as precursor for production of samples by electron beam melting, hot-compaction and high pressure torsion processes. The microstructure and magnetic properties of all samples were investigated and correlated. It was found that the mechanical deformation enhances coercivity, up to 0.58 T, while the absence of this strain is beneficial for magnetization. Among the observed techniques, hot extrusion and high pressure torsion have shown promising possibilities to further develop Mn-Al-C as permanent magnets. However, it should be taken into account the challenges related to design a proper processing window for hot extrusion and the limitation of HPT regarding the absence of texture.

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“…In the project UpGrade, researchers of the Fraunhofer IWKS optimized the Strip Casting process allowing to obtain alloys with refined microstructure for new permanent magnet grades designed for growing markets (automotive, electric power generators) with low content of critical raw materials (Tb, Dy) [66] . The refinement of the produced material flakes enabled the production of sintered magnets of equal grades while saving material and process costs [67] …”

Section: Inorganic Materials Chemistry As a Pillar For Circularity Inmentioning

confidence: 99%

Enabling Circular Economy: The Overlooked Role of Inorganic Materials Chemistry

Salviulo

Lavagnolo

Dabalà

et al. 2021

Chemistry A European J

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Production of net-shape Mn-Al permanent magnets by electron beam melting

Cited by 20 publications

References 28 publications

Additive Manufactured Polymer-Bonded Isotropic NdFeB Magnets by Stereolithography and Their Comparison to Fused Filament Fabricated and Selective Laser Sintered Magnets

Additive Manufactured Polymer-Bonded Isotropic NdFeB Magnets by Stereolithography and Their Comparison to Fused Filament Fabricated and Selective Laser Sintered Magnets

Microstructure and magnetic properties of Mn-Al-C permanent magnets produced by various techniques

Enabling Circular Economy: The Overlooked Role of Inorganic Materials Chemistry

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