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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.|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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