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Crystallization of Fe 75 Zr 25 metallic glass: a two‐step process involving metastable bcc‐Fe and polymorphic transformation
Author(s) -
Gorria Pedro,
Garitaonandia Joseba S.,
Pérez María J.,
Blanco Jesús A.,
Campo Javier
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200802241
Subject(s) - crystallization , metastability , materials science , neutron diffraction , magnetization , diffraction , crystallography , atmospheric temperature range , amorphous metal , analytical chemistry (journal) , thermodynamics , metallurgy , chemistry , optics , alloy , physics , magnetic field , chromatography , organic chemistry , quantum mechanics
The crystallization process of mechanically alloyed Fe 75 Zr 25 metallic glasses is investigated by means of both thermo‐magnetization and in situ neutron powder thermo‐diffraction experiments in the temperature range 300–1073 K. It was found that the crystallization takes place in a two‐step process, involving firstly the appearance of metastable Fe and Fe 2 Zr crystalline phases between 880 K and 980 K, and a subsequent polymorphic transformation into Fe 3 Zr above 980 K. These findings explain the anomalous magnetization vs. temperature behaviour on heating–cooling cycles.Contour plot of the neutron diffracted intensity ( λ = 1.28 Å) as a function of the Bragg diffraction angle and the temperature. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)