Devitrification of Mechanically Alloyed Fe-Nb System: Mössbauer Study of the Intermetallic Phases

descriptionPublicationkeyboard_double_arrow_right Article 03 Jan 2020 Spain English Publisher:Springer Science and Business Media LLCJournal:Metallurgical and Materials Transactions A, volume 51, pages 1,395-1,401 (issn: 1073-5623, eissn: 1543-1940,

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Authors: Manchón Gordón, Alejandro F.; Svec, P.; Ipus Bados, Jhon Jairo; Kowalczyk, M.; Blázquez Gámez, Javier Sebastián; Conde Amiano, Clara Francisca; Conde Amiano, Alejandro; +2 Authors

doi: 10.1007/s11661-019-05610-5

handle: 11441/142559 , 10261/216739

Devitrification of Mechanically Alloyed Fe-Nb System: Mössbauer Study of the Intermetallic Phases

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Abstract

Intermetallic phases in the Fe-Nb system have been obtained as products of the devitrification of a homogeneous amorphous Fe70Nb30 alloy prepared by mechanical alloying. Besides Fe2Nb Laves and Fe7Nb6 intermetallic phases, α-Fe phase has been detected by X-ray diffraction (XRD). Hyperfine parameters for both Fe2Nb and Fe7Nb6 intermetallics have been obtained from Mössbauer spectroscopy in correlation with phase identification from XRD results. Thermomagnetic measurements show changes in the Curie temperatures of the amorphous and Fe2Nb phases during the crystallization, due to compositional variations related to the developing of the α-Fe phase. Kinetics of the crystallization process has been analyzed using the classical Johnson-Mehl-Avrami-Kolmogorov kinetic theory in both isothermal and non-isothermal regimes.

European Commission MAT 2016-77265-R

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Spain

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Keywords

Mössbauer spectroscopy, Fe-Nb intermetallics, Crystallization kinetics, Amorphous and nanocrystalline alloys

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