Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ua)

A. S. Shirinyan^*, Yu. S. Bilogorodskyy, O. M. Krit

Institute of Applied Physics, National Academy of Sciences of Ukraine, Sumy, Ukraine

^*Corresponding author. E-mail address: aramshirinyan@ukr.nеt

Abstract: A new thermodynamic approach for phase stability of a nanoscale material under irradiation taking into account Gibbs free energy of phase formation and nucleation is proposed. The influence of powder dispersion and vacancy saturation on the radiation stability and phase changes of spherical Ferrum nanoparticles during irradiation is determined. The paper shows the possibility of a radiation-induced α-Fe → γ-Fe polymorphic transition, and also defines the radiation stability zones of Ferrum nanoparticles. It is shown that the competition between the energy of the accumulated vacancies in the particle, the bulk energy of the phase transformation, and the surface energy of the particle is responsible for the specific behavior of irradiated nanocrystalline Ferrum.

Keywords: irradiation, radiation stability, vacancy saturation, Ferrum nanoparticle, phase transition, thermodynamics, Gibbs energy.

1. A. Meldrum, L.A. Boatner, R.C. Ewing. Nanocrystalline Zirconia Can Be Amorphized by Ion Irradiation. Phys. Rev. Lett. 88 (2001) 025503. https://doi.org/10.1103/PhysRevLett.88.025503

2. K.E. Sickafus et al. Radiation damage effects in cubic-stabilized zirconia irradiated with 72 MeV I⁺ ions. Nucl. Instr. Meth. Phys. Res. B 141 (1998) 358. https://doi.org/10.1016/S0168-583X(98)00217-1

3. T.D. Shen. Radiation Tolerance in a Nanostructure: Is smaller better? Nucl. Inst. Meth. Phys. Res. B 266 (2008) 921. https://doi.org/10.1016/j.nimb.2008.01.039

4. J. Hohl et al. Thermodynamic stabilization of nanocrystalline aluminium. J. Mater. Sci. 56 (2021) 14611. https://doi.org/10.1007/s10853-021-06224-2

5. P.K. Suri et al. Ion irradiation induced phase transformation in gold nanocrystalline films. Scientific Reports 10 (2020) 17864. https://doi.org/10.1038/s41598-020-74779-2

6. L.T. Belkacemi et al. Radiation-induced bcc-fcc phase transformation in a Fe-3%Ni alloy. Acta Materialia 161 (2018) 61. https://doi.org/10.1016/j.actamat.2018.08.031

7. A. Kozlovskiy, D. Shlimas, M. Zdorovets. Investigation of the effect of ionizing radiation on the structural and conductive characteristics of Ni nanostructures. Vacuum 163 (2019) 103. https://doi.org/10.1016/j.vacuum.2019.02.015

8. Q. Wan et al. Grain size dependence of the radiation tolerances of nano-amorphous Ti-Si-N composite coatings. Applied Surface Science 466 (2019) 179. https://doi.org/10.1016/j.apsusc.2018.09.187

9. R.A. Andrievski. Nanostructures under extremes. Phys. Uspekhi 57(10) (2014) 945. https://doi.org/10.3367/UFNe.0184.201410a.1017

10. A. Bhattacharya, S.J. Zinkle. Cavity Swelling in Irradiated Materials. In: Comprehensive Nuclear Materials. 2nd ed. Vol. 1 (Oxford: Elsevier, 2020) p. 406. https://doi.org/10.1016/B978-0-12-803581-8.11599-1

11. A.D. Brailsford, R. Bullough. The rate theory of swelling due to void growth in irradiated metals. J. Nucl. Mater. 44 (1972) 121. https://doi.org/10.1016/0022-3115(72)90091-8

12. M. Rose, A.G. Balogh, H. Hahn. Instability of irradiation induced defects in nanostructured materials. Nucl. Instrum. Meth. Phys. Res. B 127- 128 (1997) 119. https://doi.org/10.1016/S0168-583X(96)00863-4

13. A.S. Shirinyan et al. Size-dependent hysteresis and phase formation kinetics during temperature cycling of metal nanopowders. J. Phys.: Condens. Matter 23 (2011) 245301. https://doi.org/10.1088/0953-8984/23/24/245301

14. M. Doyama, J.S. Koehler. The relation between the formation energy of a vacancy and the nearest neighbor interactions in pure metals and liquid metals. Acta Metall. 24(9) (1976) 871. https://doi.org/10.1016/0001-6160(76)90055-9

15. N. Saunders, A.P. Miodownik. CALPHAD: Calculation of Phase Diagrams: a Comprehensive Guide (New York: Elsevier Science Inc, 1998) 479 p. https://doi.org/10.1016/s1470-1804(98)x8001-6

16. J.W. Christian. Theory of Transformation in Metals and Alloys. 1st ed. (New York: Pergamon Press, 1965) 1200 p. https://www.elsevier.com/books/the-theory-of-transformations-in-metals-and-alloys/christian/978-0-08-044019-4

17. N. Mejai et al. Depth-dependent phase change in Gd₂O₃ epitaxial layers under ion irradiation. Applied Physics Letters 107(13) (2015) 131903. https://doi.org/10.1063/1.4932089