Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing

Ling Li; Kodey Jones; Brian Sales; Jason L. Pries; I. C. Nlebedim; Ke Jin; Hongbin Bei; Brian K. Post; Michael S. Kesler; Orlando Rios; Vlastimil Kunc; Robert Fredette; John Ormerod; Aaron Williams; Thomas A. Lograsso; M. Parans Paranthaman

doi:10.1016/j.addma.2018.04.001

Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing

Ling Li, Kodey Jones, Brian Sales, Jason L. Pries, I. C. Nlebedim, Ke Jin, Hongbin Bei, Brian K. Post, Michael S. Kesler, Orlando Rios, Vlastimil Kunc, Robert Fredette, John Ormerod, Aaron Williams, Thomas A. Lograsso, M. Parans Paranthaman^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

Magnetically isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts. The density of the printed magnet is ∼ 5.2 g/cm ³ . The room temperature magnetic properties are: intrinsic coercivity H _ci = 8.9 kOe (708.2 kA/m), remanence B _r = 5.8 kG (0.58 T), and energy product (BH)max = 7.3 MGOe (58.1 kJ/m ³ ). The as-printed magnets are then coated with two types of polymers, both of which improve the thermal stability as revealed by flux aging loss measurements. Tensile tests performed at 25 °C and 100 °C show that the ultimate tensile stress (UTS) increases with increasing loading fraction of the magnet powder, and decreases with increasing temperature. AC magnetic susceptibility and resistivity measurements show that the 3D printed Nd-Fe-B bonded magnets exhibit extremely low eddy current loss and high resistivity. Finally, we demonstrate the performance of the 3D printed magnets in a DC motor configuration via back electromotive force measurements.

Original language	English
Pages (from-to)	495-500
Number of pages	6
Journal	Additive Manufacturing
Volume	21
DOIs	https://doi.org/10.1016/j.addma.2018.04.001
Publication status	Published - May 2018
Externally published	Yes

Keywords

Big area additive manufacturing
Eddy current loss
High resistivity
Magnetic properties
Mechanical properties

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10.1016/j.addma.2018.04.001

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Li, L., Jones, K., Sales, B., Pries, J. L., Nlebedim, I. C., Jin, K., Bei, H., Post, B. K., Kesler, M. S., Rios, O., Kunc, V., Fredette, R., Ormerod, J., Williams, A., Lograsso, T. A., & Paranthaman, M. P. (2018). Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing. Additive Manufacturing, 21, 495-500. https://doi.org/10.1016/j.addma.2018.04.001

@article{96471588d8244a16acea7b57ad2e334f,

title = "Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing",

abstract = " Magnetically isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts. The density of the printed magnet is ∼ 5.2 g/cm 3 . The room temperature magnetic properties are: intrinsic coercivity H ci = 8.9 kOe (708.2 kA/m), remanence B r = 5.8 kG (0.58 T), and energy product (BH)max = 7.3 MGOe (58.1 kJ/m 3 ). The as-printed magnets are then coated with two types of polymers, both of which improve the thermal stability as revealed by flux aging loss measurements. Tensile tests performed at 25 °C and 100 °C show that the ultimate tensile stress (UTS) increases with increasing loading fraction of the magnet powder, and decreases with increasing temperature. AC magnetic susceptibility and resistivity measurements show that the 3D printed Nd-Fe-B bonded magnets exhibit extremely low eddy current loss and high resistivity. Finally, we demonstrate the performance of the 3D printed magnets in a DC motor configuration via back electromotive force measurements.",

keywords = "Big area additive manufacturing, Eddy current loss, High resistivity, Magnetic properties, Mechanical properties",

author = "Ling Li and Kodey Jones and Brian Sales and Pries, {Jason L.} and Nlebedim, {I. C.} and Ke Jin and Hongbin Bei and Post, {Brian K.} and Kesler, {Michael S.} and Orlando Rios and Vlastimil Kunc and Robert Fredette and John Ormerod and Aaron Williams and Lograsso, {Thomas A.} and Paranthaman, {M. Parans}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = may,

doi = "10.1016/j.addma.2018.04.001",

language = "English",

volume = "21",

pages = "495--500",

journal = "Additive Manufacturing",

issn = "2214-8604",

publisher = "Elsevier B.V.",

}

Li, L, Jones, K, Sales, B, Pries, JL, Nlebedim, IC, Jin, K, Bei, H, Post, BK, Kesler, MS, Rios, O, Kunc, V, Fredette, R, Ormerod, J, Williams, A, Lograsso, TA & Paranthaman, MP 2018, 'Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing', Additive Manufacturing, vol. 21, pp. 495-500. https://doi.org/10.1016/j.addma.2018.04.001

TY - JOUR

T1 - Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing

AU - Li, Ling

AU - Jones, Kodey

AU - Sales, Brian

AU - Pries, Jason L.

AU - Nlebedim, I. C.

AU - Jin, Ke

AU - Bei, Hongbin

AU - Post, Brian K.

AU - Kesler, Michael S.

AU - Rios, Orlando

AU - Kunc, Vlastimil

AU - Fredette, Robert

AU - Ormerod, John

AU - Williams, Aaron

AU - Lograsso, Thomas A.

AU - Paranthaman, M. Parans

PY - 2018/5

Y1 - 2018/5

N2 - Magnetically isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts. The density of the printed magnet is ∼ 5.2 g/cm 3 . The room temperature magnetic properties are: intrinsic coercivity H ci = 8.9 kOe (708.2 kA/m), remanence B r = 5.8 kG (0.58 T), and energy product (BH)max = 7.3 MGOe (58.1 kJ/m 3 ). The as-printed magnets are then coated with two types of polymers, both of which improve the thermal stability as revealed by flux aging loss measurements. Tensile tests performed at 25 °C and 100 °C show that the ultimate tensile stress (UTS) increases with increasing loading fraction of the magnet powder, and decreases with increasing temperature. AC magnetic susceptibility and resistivity measurements show that the 3D printed Nd-Fe-B bonded magnets exhibit extremely low eddy current loss and high resistivity. Finally, we demonstrate the performance of the 3D printed magnets in a DC motor configuration via back electromotive force measurements.

AB - Magnetically isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts. The density of the printed magnet is ∼ 5.2 g/cm 3 . The room temperature magnetic properties are: intrinsic coercivity H ci = 8.9 kOe (708.2 kA/m), remanence B r = 5.8 kG (0.58 T), and energy product (BH)max = 7.3 MGOe (58.1 kJ/m 3 ). The as-printed magnets are then coated with two types of polymers, both of which improve the thermal stability as revealed by flux aging loss measurements. Tensile tests performed at 25 °C and 100 °C show that the ultimate tensile stress (UTS) increases with increasing loading fraction of the magnet powder, and decreases with increasing temperature. AC magnetic susceptibility and resistivity measurements show that the 3D printed Nd-Fe-B bonded magnets exhibit extremely low eddy current loss and high resistivity. Finally, we demonstrate the performance of the 3D printed magnets in a DC motor configuration via back electromotive force measurements.

KW - Big area additive manufacturing

KW - Eddy current loss

KW - High resistivity

KW - Magnetic properties

KW - Mechanical properties

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U2 - 10.1016/j.addma.2018.04.001

DO - 10.1016/j.addma.2018.04.001

M3 - Article

AN - SCOPUS:85045396329

SN - 2214-8604

VL - 21

SP - 495

EP - 500

JO - Additive Manufacturing

JF - Additive Manufacturing

ER -

Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing

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Keywords

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