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Nanomaterials 2019, 9(4), 544; https://doi.org/10.3390/nano9040544

On the Formation of Nanocrystalline Grains in Metallic Glasses by Means of In-Situ Nuclear Forward Scattering of Synchrotron Radiation

1
Department of Experimental Physics, Faculty of Science, Palacký University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
2
Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Ilkovičova 3, 812 19 Bratislava, Slovakia
*
Author to whom correspondence should be addressed.
Received: 28 February 2019 / Revised: 28 March 2019 / Accepted: 29 March 2019 / Published: 4 April 2019
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Abstract

Application of the so-called nuclear forward scattering (NFS) of synchrotron radiation is presented for the study of crystallization of metallic glasses. In this process, nanocrystalline alloys are formed. Using NFS, the transformation process can be directly observed during in-situ temperature experiments not only from the structural point of view, i.e., formation of nanocrystalline grains, but one can also observe evolution of the corresponding hyperfine interactions. In doing so, we have revealed the influence of external magnetic field on the crystallization process. The applied magnetic field is not only responsible for an increase of hyperfine magnetic fields within the newly formed nanograins but also the corresponding components in the NFS time spectra are better identified via occurrence of quantum beats with higher frequencies. In order to distinguish between these two effects, simulated and experimental NFS time spectra obtained during in-situ temperature measurements with and without external magnetic field are compared. View Full-Text
Keywords: nuclear forward scattering; metallic glasses; magnetic annealing; synchrotron radiation; crystallization kinetics nuclear forward scattering; metallic glasses; magnetic annealing; synchrotron radiation; crystallization kinetics
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Smrčka, D.; Procházka, V.; Vrba, V.; Miglierini, M.B. On the Formation of Nanocrystalline Grains in Metallic Glasses by Means of In-Situ Nuclear Forward Scattering of Synchrotron Radiation. Nanomaterials 2019, 9, 544.

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