Digitale Medien
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
68 (1996), S. 129-131
ISSN:
1077-3118
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
Thermodynamically stable nanocrystalline Sm2Fe15Ga2C2 powders were prepared by intense ball milling of homogenized and coarsely ground ingots, and a subsequent annealing of the powders in an argon atmosphere. Such processing results in magnetically isotropic material with a room-temperature coercivity μ0JHc of up to 1.2 T. Scanning electron microscopy observations suggest a homogeneous microstructure, and combined with Scherrer formula estimations, an average grain size of 〈100 nm has been determined. The coercivity can be preserved at high annealing temperatures when the process is performed at an argon pressure of about 800 mbar. The attempt of a hot-pressing procedure resulted in a magnet with a density of 86% (6.7 g/cm3) of the theoretical density (7.8 g/cm3) and a coercivity of 1.3 T. © 1996 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.116778
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