Nuclear Physics and Atomic Energy

ядерна ф≥зика 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

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Nucl. Phys. At. Energy 2022, volume 23, issue 4, pages 255-262.
Section: Radiation Physics.
Received: 12.11.2022; Accepted: 30.12.2022; Published online: 6.02.2023.
PDF Full text (ua)

Phase stability of spherical Ferrum nanoparticles under radiation saturation with vacancies

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.


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