In-situ small-angle scattering study on the formation of a nanocrystalline soft-magnetic alloy
| Autor: | Fábio C.S. da Silva, D. R. dos Santos, Marcelo Knobel, Iris L. Torriani |
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| Rok vydání: | 2000 |
| Předmět: |
Amorphous metal
Materials science Small-angle X-ray scattering Annealing (metallurgy) Nucleation Analytical chemistry General Biochemistry Genetics and Molecular Biology Grain size law.invention Condensed Matter::Materials Science Crystallography law Small-angle scattering Magnetic alloy Crystallization |
| Zdroj: | Journal of Applied Crystallography. 33:473-477 |
| ISSN: | 0021-8898 |
| DOI: | 10.1107/s0021889899015599 |
| Popis: | A detailed study is presented on the nanocrystallization of the amorphous alloy Fe86Zr7Cu 1B6 (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. |
| Databáze: | OpenAIRE |
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