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Title: In situ correlation between metastable phase-transformation mechanism and kinetics in a metallic glass
Authors: Orava, J.
Balachandran, S.
Han, X.
Shuleshova, O.
Nurouzi, E.
Soldatov, I.
Oswald, S.
Gutowski, O.
Ivashko, O.
Dippel, A. -C.
Zimmermann, M.
Ivanov, Y. P.
Greer, A. L.
Raabe, D.
Herbig, M.
Kaban, I.
Issue Date: 2021
Publisher: Nature Research
Citation: In situ correlation between metastable phase-transformation mechanism and kinetics in a metallic glass / J. Orava, S. Balachandran, X. Han, et al. — DOI 10.1038/s41467-021-23028-9 // Nature Communications. — 2021. — Vol. 12. — Iss. 1. — 2839.
Abstract: A combination of complementary high-energy X-ray diffraction, containerless solidification during electromagnetic levitation and transmission electron microscopy is used to map in situ the phase evolution in a prototype Cu-Zr-Al glass during flash-annealing imposed at a rate ranging from 102 to 103 K s−1 and during cooling from the liquid state. Such a combination of experimental techniques provides hitherto inaccessible insight into the phase-transformation mechanism and its kinetics with high temporal resolution over the entire temperature range of the existence of the supercooled liquid. On flash-annealing, most of the formed phases represent transient (metastable) states – they crystallographically conform to their equilibrium phases but the compositions, revealed by atom probe tomography, are different. It is only the B2 CuZr phase which is represented by its equilibrium composition, and its growth is facilitated by a kinetic mechanism of Al partitioning; Al-rich precipitates of less than 10 nm in a diameter are revealed. In this work, the kinetic and chemical conditions of the high propensity of the glass for the B2 phase formation are formulated, and the multi-technique approach can be applied to map phase transformations in other metallic-glass-forming systems. © 2021, The Author(s).
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85105850691
PURE ID: 21859992
ISSN: 20411723
DOI: 10.1038/s41467-021-23028-9
metadata.dc.description.sponsorship: J.O., S.B., M.H., and I.K. are grateful to the Deutsche Forschungsgemeinschaft (DFG), contracts No.: Ka-3209/9-1 and HE 7225/1-1, for funding. Y.P.I. and A.L.G. acknowledge support from the European Research Council under the European Union’s Horizon 2020 research and innovation program (grant ERC-2015-AdG-695487: Extend Glass). We acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at the beamline P21.1 at PETRA III. We are grateful to S. Donath, S. Kaschube, B. Opitz, H. Siegel and S. Ziller (IFW Dresden) for technical support.
CORDIS project card: ERC-2015-AdG-695487
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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