Melt-spun PrCo5 and related magnet materials: Coercivity enhancement by carbon addition
- 1 October 1993
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 74 (7) , 4651-4659
- https://doi.org/10.1063/1.354355
Abstract
We have investigated melt-spun Pr-Co alloys with the objective of optimizing their permanent magnet characteristics. Among a variety of elemental additives studied, carbon was found capable of significantly improving the properties, the coercivity in particular. For binary Pr-Co systems optimum values of the remanence, Br=5.7 kG, intrinsic coercivity, Hci=5.8 kOe, and energy product, (BH)max=4.7 MG Oe, were obtained from the Pr16Co84 composition. These values were enhanced to Br=5.8 kG, Hci=16.5 kOe, and (BH)max=7.4 MG Oe for Pr18Co76C6. In both cases the melt-spun ribbons were principally composed of PrCo5. The 16.5 kOe coercivity of the carbon-containing ribbons is the highest ever reported for a PrCo5-based material. Two new rare earth-cobalt phases were tentatively identified during the course of this work: PrCo7 (hexagonal TbCu7 structure) and PrCo2Cx (cubic MgCu2 structure). Survey results for other melt-spun, RCo5-based alloys are also described.This publication has 12 references indexed in Scilit:
- Magnetically hard Sm2Fe17Nx prepared by nitriding melt-spun ribbonsApplied Physics Letters, 1992
- Neodymium-iron-boron permanent magnetsJournal of Magnetism and Magnetic Materials, 1991
- B materials: Intrinsic properties and technological aspectsReviews of Modern Physics, 1991
- PrCo5-based high-energy-density permanent magnetsJournal of the Less Common Metals, 1989
- Manufacture of NdFeB permanent magnets by rapid solidificationJournal of the Less Common Metals, 1989
- Magnetic hardening of Pr2Co14BJournal of Applied Physics, 1988
- High energy magnets from PrCo5IEEE Transactions on Magnetics, 1984
- New High-Performance Permanent Magnets Based on Rare Earth-Transition Metal CompoundsAnnual Review of Materials Science, 1978
- Composition and crystal structure of hexagonal Cu-rich rare earth–copper compoundsActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1971
- Intermetallic compounds in the system samarium-cobaltJournal of the Less Common Metals, 1968