| Affiliation: | 1. Critical Materials Institute, Ames Laboratory, Ames, Iowa, USA;2. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA;3. 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 (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%. |
