Nanocrystalline Fe73.5cu1nb3si13.5b9 Obtained By Direct-current Joule Heating - Magnetic and Mechanical-properties
作者： P. Allia , M. Baricco , M. Knobel , P. Tiberto , F. Vinai
DOI: 10.1080/13642819308217941
关键词: Nanocrystalline material 、 Materials science 、 Joule heating 、 Annealing (metallurgy) 、 Electrical resistance and conductance 、 Composite material 、 Alloy 、 Embrittlement 、 Amorphous solid 、 Metallurgy 、 Ferromagnetism
摘要: Nanocrystalline ferromagnetic materials obtained by proper annealing of amorphous ribbons display excellent soft magnetic properties. However, the technological application these nanostructured ferromagnets is hindered their high brittleness. Direct-current Joule heating in vacuo exploited to increase both permeability and ductility nanocrystalline Fe73.5Cu1Nb3Si13.5B9. The development nanostructure samples submitted different Joule-heating currents for same time (t = 60 s) has been analysed means X-ray diffraction, associated with reduced fracture strain measurements. Measurements electrical resistance performed course heat treatment allows us single out an activated process atomic rearrangement occurring phase. Fracture data show that alloy's embrittlement mainly be ascribed this rather than nanocrystallization. It shown further improvement can inducing fast nanocrystallization
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