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Type: Artigo de evento
Title: In-situ Small-angle Scattering Study On The Formation Of A Nano-crystalline Soft-magnetic Alloy
Author: Dos Santos D.R.
Torriani I.L.
Silva F.C.S.
Knobel M.
Abstract: A detailed study is presented on the nanocrystallization of the amorphous alloy Fe86Zr7Cu 1 B6 (indices indicate at. %). Melt-spun ribbons were rapidly annealed by Joule heating, and the electrical resistance showed strong variations during thermal treatment. X-ray diffraction patterns indicate that these variations are related to the nucleation and growth of α-Fe nanocrystals, and from peak profile analysis we obtained the average grain size and crystalline volume fraction for different annealing currents. The disorder-order transition was studied by in-situ small-angle X-ray scattering during conventional furnace treatments. SAXS intensity evolution for different temperatures, both below and above the crystallization temperature of the alloy, showed that a fast atomic rearrangement leads to the formation of atomic clusters before crystallization. The evolution of the size distribution function of these clusters as a function of time and temperature was obtained assuming a polydisperse system of spherical particles.
Rights: aberto
Identifier DOI: 10.1107/S0021889899015599
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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