Additive manufacturing of Sm-Fe-N magnets

Engerroff, Juliano Assis Baron; Baldissera, A.B.; Magalhães, Maria de Lourdes Borba; Lamarão, Pedro; Wendhausen, Paulo A.P.; Ahrens, Carlos Henrique; Mascheroni, José Maria

doi:10.1016/j.jre.2019.04.012

Cited by 14 publications

(11 citation statements)

References 14 publications

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“…The relations between process parameters, filler fraction and morphology on the magnetic and mechanical performance of bonded magnets produced by AM processes are the subject of current research but are yet to be fully understood [3,12,13,15,16]. Due to its high flowability, which influences the processability of the magnetic filler in LPBF, and its easy availability, the focus of previous research on AM of bonded magnets has mostly been on the utilization of spherical, gas-atomized powders with particles sizes of around 20 -50 µm [3].…”

Section: Introductionmentioning

confidence: 99%

Polymer-bonded magnets produced by laser powder bed fusion: Influence of powder morphology, filler fraction and energy input on the magnetic and mechanical properties

Schäfer

Braun

Riegg

et al. 2023

Materials Research Bulletin

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Section: Introductionmentioning

confidence: 99%

Polymer-bonded magnets produced by laser powder bed fusion: Influence of powder morphology, filler fraction and energy input on the magnetic and mechanical properties

Schäfer

Braun

Riegg

et al. 2023

Materials Research Bulletin

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“…The typical temperature coefficient of intrinsic coercivity, β is −0.36%/K 14 . Therefore, isotropic and anisotropic bonded magnets of Nd 2 Fe 14 B, Sm 2 Fe 17 N 3 , or their hybrid, with different thermal stability values, can be produced using polyphenylene sulfide (PPS) or nylon polymer binders 15–19 …”

Section: Introductionmentioning

confidence: 99%

“…14 Therefore, isotropic and anisotropic bonded magnets of Nd 2 Fe 14 B, Sm 2 Fe 17 N 3 , or their hybrid, with different thermal stability values, can be produced using polyphenylene sulfide (PPS) or nylon polymer binders. [15][16][17][18][19] Li et al have demonstrated a (BH) max of 43.49 kJ/m 3 (5.47 MGOe) with good thermal stability for isotropic bonded permanent magnets with temperature coefficients of remanence, α = 0.11%/K and coercivity, β = 0.34%/K for 65-vol% isotropic NdFeB in nylon. 20 We have recently demonstrated anisotropic hybrid bonded magnets of 11 MGOe (87.5 kJ/m3) using a 65-vol% NdFeB + SmFeN hybrid bonded in nylon.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of anisotropic bonded magnets prepared by additive manufacturing

et al. 2022

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In this research, anisotropic NdFeB + SmFeN hybrid and NdFeB bonded magnets are additively printed in a polyphenylene sulfide (PPS) polymer binder. Printed NdFeB + SmFeN PPS bonded magnets displayed excellent magnetic properties (Br [remanence] = 6.9 kG [0.69 T], Hcj [coercivity] = 8.3 kOe [660 kA/m], and BHmax [energy product] = 9.9 MGOe [79 kJ/m3]) with superior corrosion resistance and thermal stability. The anisotropic NdFeB bonded magnet shows a high coercivity of 14.6 kOe (1162 kA/m) with a BHmax of 8.7 MGOe (69 kJ/m3). The coercivity and remanence temperature coefficients for NdFeB + SmFeN hybrid bonded magnets are −0.10%/K and −0.46%/K, and for NdFeB bonded magnets are −0.14%/K and −0.53%/K in the range of 300–400 K, indicating that the hybrid bonded magnets are thermally stable. The average flux aging loss for hybrid magnets was also determined to be very stable over 2000 h at 448 K (175°C) in air with 2.04% compared to that of NdFeB magnets with 3.62%.

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“…Innovative developments in AM have renewed research interest in the manufacturing of bonded magnets. [13][14][15][16][17][18][19] AM offers several processing advantages: it minimizes waste, eliminates tooling needs, and accelerates time to market. From a materials processing perspective, there is additional flexibility to print AM bonded magnets in different polymer media since it imparts better and desired thermal stability for various desired applications.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Anisotropic Sm-Fe-N Nylon Bonded Permanent Magnets

Gandha

Paranthaman

Sales

et al. 2021

Preprint

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Fabricating a bonded magnet with a near-net shape in suitable thermoplastic polymer binders is of paramount importance in the development of cost-effective energy technologies. In this work, anisotropic Sm2Fe17N3 (Sm-Fe-N) bonded magnets are additively printed using Sm-Fe-N anisotropic magnetic particles in a polymeric binder polyamide-12 (PA12). The anisotropic bonded permanent magnets are fabricated by Big Area Additive Manufacturing followed by post-aligned in a magnetic field. Optimal post-alignment results in an enhanced remanence of ~ 0.68 T in PA12 reflected in a parallel-oriented (aligned) measured direction. The maximum energy product achieved for the additively printed anisotropic bonded magnet of Sm-Fe-N in PA12 polymer is 78.8 KJ m-3. Our results show advanced processing flexibility of additive manufacturing for the development of Sm-Fe-N bonded magnets in polymer media designed for applications with no critical rare earth magnets.

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Additive manufacturing of Sm-Fe-N magnets

Cited by 14 publications

References 14 publications

Polymer-bonded magnets produced by laser powder bed fusion: Influence of powder morphology, filler fraction and energy input on the magnetic and mechanical properties

Polymer-bonded magnets produced by laser powder bed fusion: Influence of powder morphology, filler fraction and energy input on the magnetic and mechanical properties

Thermal stability of anisotropic bonded magnets prepared by additive manufacturing

Additive Manufacturing of Anisotropic Sm-Fe-N Nylon Bonded Permanent Magnets

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