Thermal stability of anisotropic bonded magnets prepared by additive manufacturing

Gandha, Kinjal; Paranthaman, Mariappan Parans; Wang, Haobo; Liu, Xubo; Nlebedim, Ikenna C.

doi:10.1111/jace.18609

Thermal stability of anisotropic bonded magnets prepared by additive manufacturing

Journal Article · Mon Jun 27 00:00:00 EDT 2022 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.18609· OSTI ID:1874062

Gandha, Kinjal ^[1]; ^[2]; Wang, Haobo ^[3]; Liu, Xubo ^[1]; ^[1]

Critical Materials Institute Ames Laboratory Ames Iowa USA
Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge Tennessee USA
Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge Tennessee USA, The Bredesen Center The University of Tennessee Knoxville Tennessee USA

Abstract

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 ( B _r [remanence] = 6.9 kG [0.69 T], H _cj [coercivity] = 8.3 kOe [660 kA/m], and BH _max [energy product] = 9.9 MGOe [79 kJ/m ³ ]) 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 BH _max of 8.7 MGOe (69 kJ/m ³ ). 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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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office

Grant/Contract Number:: AC02-07CH11358; AC05-00OR22725

OSTI ID:: 1874062

Alternate ID(s):: OSTI ID: 1873413
OSTI ID: 1874064

Report Number(s):: IS-J-10,828

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 106; ISSN 0002-7820

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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