Speaker
Description
Metallic glasses (MGs) are promising materials for radiation-resistant applications due to their disordered atomic structure and excellent magnetic properties. This study examines the effects of neutron irradiation (fluence up to $3\times10^{16}$ $cm^{−2}$) on Fe-based metallic glasses using Mössbauer spectroscopy (MS) and X-ray diffraction (XRD).
XRD analysis, particularly total scattering factor $S(q)$ and pair distribution function $G(r)$, revealed only minor changes, suggesting that the overall atomic arrangement remained largely preserved. However, Mössbauer spectroscopy detected subtle structural modifications, as evidenced by changes in hyperfine field distributions and the orientation of the net magnetic moment. These observations indicate that even relatively low neutron fluence can induce localized atomic rearrangements, which could influence the material’s magnetic properties.
When compared to previous studies [1], which investigated neutron irradiation effects at fluences up to $10^{19}$ $cm^{−2}$, our results suggest that structural modifications can be observed even at much lower fluences. This highlights the high sensitivity of Mössbauer spectroscopy in detecting irradiation-induced effects in metallic glasses.
The findings contribute to understanding the radiation tolerance of Fe-based metallic glasses and their potential for applications in radiation-exposed environments.
Acknowledgements
This work was supported by the Large Research Infrastructures of the Ministry of Education, Youth and Sports of the Czech Republic no. LM2023073 and by the project VEGA 1/0010/24. This study was co-funded by the EU NextGenerationEU through the Recovery and Resilience Plan for Slovakia under the project No. 09I03-03-V03-00034.
References
[1] M. B. Miglierini, “Radiation Effects in Amorphous Metallic Alloys as Revealed by Mössbauer Spectrometry: Part I. Neutron Irradiation,” Metals, vol. 11, no. 5. MDPI AG, p. 845, May 20, 2021. https://doi.org/10.3390/met11050845
