Nanostructured materials for soft magnetic applications produced by fast dc Joule heating

Amorphous Fe/sub 73.5/Nb/sub 3/Cu/sub 1/Si/sub 13.5/B/sub 9/ ribbons were submitted to fast direct current (dc) Joule-heating treatment in vacuum. The electrical resistance in the course of fast Joule heating displays distinctive features during the development of the nanocrystalline phase, which are explained using a recently developed theoretical model. The experimental parameters of the current annealing were optimized in order to obtain ductile soft magnetic materials using very high heating rates.<
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