Microstructure of Gd-doped dysprosium hafnate after irradiation with light and heavy ions

Authors

  • M.S. Staltsov National Research Nuclear University MEPhI, Moscow, Russia
  • D.P. Shornikov National Research Nuclear University MEPhI, Moscow, Russia
  • M.D. Prokhorova National Research Nuclear University MEPhI, Moscow, Russia
  • S.V. Chuvikov JSC Research Institute NPO Luch, Podolsk, Moscow Region, Russia
  • A.A. Urusov JSC Research Institute NPO Luch, Podolsk, Moscow Region, Russia
  • A.A. Mokrushin JSC Research Institute NPO Luch, Podolsk, Moscow Region, Russia
  • V.D. Risovaniy JSC Research Institute NPO Luch, Podolsk, Moscow Region, Russia

DOI:

https://doi.org/10.63907/ansa.v2i2.87

Keywords:

Gd-doped dysprosium hafnate, absorber materials, ion irradiation, radiation resistance, voids, swelling

Abstract

The evolution of the microstructure of the $0.45\mathrm{Dy_2O_3}\cdot0.50\mathrm{HfO_2}\cdot0.05\mathrm{Gd_2O_3}$
ceramic compound under sequential irradiation with nickel and helium ions is presented. Irradiation was performed at temperatures of 350 and 550~$^{\circ}$C to damage doses in the range of 20--300 displacements per atom (dpa). The formation of a shallow and relatively uniform porous layer along the ion penetration path is shown. The average size and number density of voids and helium bubbles increase with increasing irradiation dose and temperature. The highest swelling was observed for the samples
irradiated at 550~$^{\circ}$C to a dose of 300~dpa. It is shown that Gd-doped dysprosium hafnate exhibits slightly lower porosity and swelling parameters compared with undoped dysprosium hafnate. However, the selected gadolinium content does not allow any explicit trends to be established unambiguously.

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Published

2026-03-30

Issue

Vol. 2 No. 2 (2026): Advances in Nuclear Science and Applications

Section

Materials science, multidisciplinary – scie

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