Melt‐spun PrCo5and related magnet materials: Coercivity enhancement by carbon addition

Autor:	D. J. Van Wingerden, C. B. Murphy, C. D. Fuerst, J. F. Herbst
Rok vydání:	1993
Předmět:	Materials science chemistry Hexagonal crystal system Remanence Magnet Metallurgy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Survey result Coercivity Carbon
Zdroj:	Journal of Applied Physics. 74:4651-4659
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.354355
Popis:	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.
Databáze:	OpenAIRE
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