Nanocrystalline FeSiBNbCu alloys: Differences between mechanical and thermal crystallization process in amorphous precursors
| Autor: | M. López, J. de la Venta, Antonio Hernando, Pilar Marín, P. Agudo, I. Carabias |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Alloy Metals and Alloys engineering.material Nanocrystalline material law.invention Amorphous solid Differential scanning calorimetry Chemical engineering Mechanics of Materials law Phase (matter) Materials Chemistry engineering Grain boundary Crystallization Ball mill |
| Zdroj: | Journal of Alloys and Compounds. :199-202 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2006.08.127 |
| Popis: | Nanocrystalline magnetic particles obtained by high energy ball milling of FeSiBNbCu alloy were prepared from rapidly quenched ribbons as a starting material. Structural characterization was made by using X-ray diffraction (XRD), differential scanning calorimetry (DSC), atomic force microscopy (AFM) and Mossbauer spectroscopy. The structural changes observed in this amorphous material suggest that nanocrystallization process takes place in a different way from the one induced by thermal treatments. Our different studies reveals that after short grinding times (up to 40 h) the material is composed by a two phase system of very fine nanocrystals embedded in a residual amorphous phase, while for largest periods of milling (from 140 h) the sample consists of a very fine nanocrystalline phase with a large fraction of grain boundary. |
| Databáze: | OpenAIRE |
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