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- Title
Magnetic properties of Pr-Fe-Co-V-W-Si-B system exchange spring magnets.
- Authors
Yamamoto, Hiroshi; Nakanishi, Takashi
- Abstract
The melt-spun ribbons of Pr-Fe-Co-V-W-Si-B system alloys were prepared by single roller rapid-quenching method. The effects of composition, surface velocity, and heat treatment on the magnetic properties were investigated. The P9sFe71Co8V0.5W0.5Si0.5B10.5 alloy ribbons prepared at a surface velocity of 12.5 m/s were crystallized by heat treatment, and the optimum heat-treatment condition was found to be at 575°C for 3 min, for which the magnetic properties were (BH)max = 136.1 kJ/m3, Jr = 0.93 T, HcJ = 652.2 kA/m, and HcB = 528.3 kA/m. The temperature coefficients of Jr and HcJ for the ribbons crystallized from melt-spun ribbons of Pr9Fe71Co8V0.5W0.5Si0.5B10.5 alloy were α(Jr)ave = -0.057%/°C and α(HcJ) = -0.450%/°C. The value of (B)max for the compression molding Pr9Fe71Co8V0.5W0.5Si0.5B10.5 isotropic bonded magnet prepared by using the ribbons annealed at 575°C for 3 min is 80.0 kJ/m3, and the density is 6.24 Mg/m3. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 157(3): 10–16, 2006; Published online in Wiley InterScience (<URL>www.interscience.wiley.com</URL>). DOI 10.1002/eej.20211 Copyright © 2006 Wiley Periodicals, Inc.
- Subjects
BONDED magnets; MAGNETIC flux; MAGNETIC fields; TEMPERATURE; MAGNETS; ELECTRONICS
- Publication
Electrical Engineering in Japan, 2006, Vol 157, Issue 3, p10
- ISSN
0424-7760
- Publication type
Article
- DOI
10.1002/eej.20211