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Article Dans Une Revue Journal of Alloys and Compounds Année : 2021

Multiscale investigation of the crystallization mechanisms and solute redistribution during annealing of a Fe64B24Y4Nb6Al0.4 metallic glass

Résumé

The mechanisms and the sequence of crystallization of a Fe64B24Y4Nb6Al0.4 metallic glass were investigated experimentally. To this end, the microstructure of the metallic glass after interrupted isothermal treatments at a temperature between glass transition and primary crystallization was studied by complementary techniques, namely atom probe tomography, transmission electron microscopy and X-ray diffractometry. During the early stages of crystallization of the glass, some nanometric (Fe,Nb)B crystals nucleate first by rejecting Y at their interface, which hinders their growth. The Fe62B14Y3 dendritic phase starts growing in a second step. Longer annealings lead to the development of chemical gradients in the amorphous matrix surrounding Fe62B14Y3 crystals, which favors the nucleation of additional nanometric (Fe,Nb)2.4B crystals.
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hal-03330538 , version 1 (04-10-2021)

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Marie-Noëlle Avettand-Fènoël, Xavier Sauvage, Maya Marinova, Ahmed Addad. Multiscale investigation of the crystallization mechanisms and solute redistribution during annealing of a Fe64B24Y4Nb6Al0.4 metallic glass. Journal of Alloys and Compounds, 2021, Journal of Alloys and Compounds, 887, pp.161264. ⟨10.1016/j.jallcom.2021.161264⟩. ⟨hal-03330538⟩
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