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Structure and magnetic properties of Fe–Nb–B amorphous/nanocrystalline alloys produced by compaction of mechanically alloyed powders

 

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Opened Access Structure and magnetic properties of Fe–Nb–B amorphous/nanocrystalline alloys produced by compaction of mechanically alloyed powders
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Author: Conde Amiano, Alejandro
Ipus Bados, Jhon Jairo
Blázquez Gámez, Javier Sebastián
Franco García, Victorino
Krasnowski, Marek
Kulik, Tadeusz A.
Lozano Pérez, S.
Department: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Date: 2010
Published in: Journal of Applied Physics, 107 (073901), 1-6
Document type: Article
Abstract: Mechanical alloying of Fe75Nb10B15 and Fe85Nb5B10 systems has been performed from an initial mixture of elemental powders. A bcc supersaturated solid solution is developed during milling for both alloys. However, Fe75Nb10B15 alloy also develops an amorphous phase, which amount increases with milling time. Milled powder samples were compacted at 7.7 GPa at different temperatures. Scanning electron microscopy images show that the presence of amorphous phase enhances the quality of compaction. Compaction at 823 K preserves both microstructure and magnetic properties of as-milled powders in both alloys. Compaction at 973 K affects mainly the crystalline fraction of the alloy with 10 at. % Nb. Compaction at 1273 K yields the formation of bcc Nb and fcc Fe23B6 phases, which magnetically harden the material.
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URI: http://hdl.handle.net/11441/33142

DOI: http://dx.doi.org/10.1063/1.3319669

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