Article
Crystallization behavior and magnetic properties of Cu-containing Fe- Cr- Mo- Ga- P- C- B alloys
Alternative title | Comportamiento de cristalización y las propiedades magnéticas de Cu-que contiene aleaciones de Fe-Cr-Mo-Ga-PCB |
Author/s | Borrego Moro, Josefa María
Conde Amiano, Clara Francisca Conde Amiano, Alejandro |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 2006 |
Deposit Date | 2015-12-02 |
Published in |
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Abstract | Multicomponent Fe65.5Cr4Mo4Ga4P12C5B5.5 amorphous alloy is known to have good soft magnetic
properties combined with large glass-forming ability. Searching for a nanocrystalline structure that
could improve its magnetic ... Multicomponent Fe65.5Cr4Mo4Ga4P12C5B5.5 amorphous alloy is known to have good soft magnetic properties combined with large glass-forming ability. Searching for a nanocrystalline structure that could improve its magnetic properties, Cr and Mo were partially substituted by Cu. The devitrification process of Cu-containing alloys shows an additional broad crystallization event that can be described by an Avrami law, with an exponent close to unity, typical for nanocrystallization phenomena. The microstructure of the nanocrystalline alloys consists of Fe Ga nanocrystals with a mean grain size of 5–10 nm embedded in an amorphous matrix. The maximum crystalline volume fraction achieved at the end of the nanocrystallization process was found to be of around 20% and for alloys with high Cu content a number of crystals of larger size 40 nm were observed. The combined use of x-ray diffraction and Mössbauer spectrometry allowed to estimate the compositions of both the nanocrystalline grains and the amorphous residual phase of nanocrystalline alloys. The complex hyperfine structure of the studied alloys at the end of the nanocrystallization process was characterized. © |
Funding agencies | European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
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