Development of dy-free NdFeB anisotropic bonded magnet (New MAGFINE)

Noguchi, Kozo; Mishima, C.; Yamazaki, Masao; Matsuoka, Hiroshi; Mitarai, H.; Honkura, Y.

doi:10.1109/edpc.2011.6085539

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…higher density and lower porosity can lead to improved magnetic performance, resulting in lower flux loss. The rule of thumb in industry is that magnets should not have flux loss higher than 5% over 1000 h of testing [9,30]. Table 10 provides a summary of the environmental tests performed to evaluate the stability of the magnets, as well as the final irreversible flux loss observed after testing.…”

Section: Characterization Of the Fdm-printed Polymer-bonded Magnetsmentioning

confidence: 99%

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

Damnjanović

Kovačević

2023

Materials

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In this research, the feasibility of additive manufacturing of permanent bonded magnets using fused deposition modelling (FDM) technology was investigated. The study employed polyamide 12 (PA12) as the polymer matrix and melt-spun and gas-atomized Nd–Fe–B powders as magnetic fillers. The effect of the magnetic particle shape and the filler fraction on the magnetic properties and environmental stability of polymer-bonded magnets (PBMs) was investigated. It was found that filaments for FDM made with gas-atomized magnetic particles were easier to print due to their superior flowability. As a result, the printed samples exhibited higher density and lower porosity when compared to those made with melt-spun powders. Magnets with gas-atomized powders and a filler loading of 93 wt.% showed a remanence (Br) of 426 mT, coercivity (Hci) of 721 kA/m, and energy product (BHmax) of 29 kJ/m3, while melt-spun magnets with the same filler loading had a remanence of 456 mT, coercivity of 713 kA/m, and energy product of 35 kJ/m3. The study further demonstrated the exceptional corrosion resistance and thermal stability of FDM-printed magnets, with less than 5% irreversible flux loss when exposed to hot water or air at 85 °C for over 1000 h. These findings highlight the potential of FDM printing for producing high-performance magnets and the versatility of this manufacturing method for various applications.

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Section: Characterization Of the Fdm-printed Polymer-bonded Magnetsmentioning

confidence: 99%

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

Damnjanović

Kovačević

2023

Materials

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“…The adoption of bonded magnets [19] aims at increasing the flux with respect to ferrites [20], [21] and can represent a good economic compromise with respect to sintered magnets [22], [23].…”

Section: Fig 1 -Brushless Motor Under Exammentioning

confidence: 99%

“…The authors' main goal is the evaluation of the potential benefits coming from the substitution of the anisotropic ferrite magnets with bonded ones [5], [6], [20] and the influence of the magnetization direction on the losses in the machine.…”

Section: Materials and Magnetization Processesmentioning

confidence: 99%

PM fractional machines adopting bonded magnets: Effect of different magnetizations on the energetic performance

Ferraris

Pošković

et al. 2012

2012 IEEE International Energy Conference and Exhibition (ENERGYCON)

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The adoption of Permanent Magnets in small brushless machines for automotive applications is becoming frequent. Some research on bonded magnets is being carried on to substitute the ferrites. In the paper the parallel and radial magnetizations are considered: the different process complexity levels are analyzed and the effects on the iron losses and the energetic performances are evaluated by means of a simulation analysis and its experimental validation.

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“…Unfortunately, MQA or Magne Nd-Fe-B powder will lose coercivity and also magnet powder becomes very reactive in air when the powder size is reduced to several micrometers. [18][19][20] On the other hand, Sm-Fe-N powder can achieve high coercivity with a particle size of less than several micrometres. [21][22][23][24] The varied dependence of coercivity on particle size is related to the different coercivity mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Packing bimodal magnetic particles to fabricate highly dense anisotropic rare earth bonded permanent magnets

et al. 2023

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Development of dy-free NdFeB anisotropic bonded magnet (New MAGFINE)

Cited by 11 publications

References 5 publications

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

Influence of Magnet Particle Shape on Magnetic and Environmental Stability of FDM Polymer-Bonded Magnets

PM fractional machines adopting bonded magnets: Effect of different magnetizations on the energetic performance

Packing bimodal magnetic particles to fabricate highly dense anisotropic rare earth bonded permanent magnets

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