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Devitrification of Mechanically Alloyed Fe-Nb System: Mössbauer Study of the Intermetallic Phases
Metallurgical and Materials Transactions A ( IF 1.985 ) Pub Date : 2020-01-03 , DOI: 10.1007/s11661-019-05610-5
A. F. Manchón-Gordón, P. Svec, J. J. Ipus, M. Kowalczyk, J. S. Blázquez, C. F. Conde, A. Conde, P. Svec, T. Kulik

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.
更新日期:2020-01-04

 

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