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 (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%.
| Original language | English |
|---|---|
| Pages (from-to) | 166-171 |
| Number of pages | 6 |
| Journal | Journal of the American Ceramic Society |
| Volume | 106 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2023 |
Funding
This study was supported by funds received from the CSIR, Government of India project no. No38(1394)/14/EMR‐II and internal grants of the International Center for Genetic Engineering and Biotechnology (ICGEB). This research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. Part of the printing efforts at Oak Ridge National Laboratory was also supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Wind Energy Technologies Office Program. Thanks are due to Brian Post and John Lindahl with BAAM printing of magnets. This manuscript has been authored, in part, by UT-Battelle, LLC, under contract DE-AC05-00OR22725 and Ames Laboratory, operated by Iowa State University under contract DE-AC02-07CH11358 with the US Department of Energy (DOE). This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US DOE. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
| Funders | Funder number |
|---|---|
| Critical Materials Institute | |
| DOE Public Access Plan | |
| Wind Energy Technologies | |
| U.S. Department of Energy | |
| Advanced Manufacturing Office | |
| Office of Energy Efficiency and Renewable Energy | |
| International Center for Genetic Engineering and Biotechnology | |
| Ames Laboratory | DE-AC02-07CH11358 |
| UT-Battelle | DE-AC05-00OR22725 |
| Council of Scientific and Industrial Research, India | No38(1394)/14/EMR‐II |
Keywords
- NdFeB anisotropic bonded magnet, PPS binder
- additive manufacturing or 3D printing
- corrosion resistance
- hybrid (NdFeB + SmFeN) anisotropic bonded magnet
- magnetic properties
- thermal stability
