Microstructure of dysprosium hafnate after sequential irradiation with heavy and light ions
DOI:
https://doi.org/10.63907/ansa.v2i1.73Keywords:
dysprosium hafnate, ion irradiation, microstructure evolution, heavy ions, radiation damageAbstract
The paper presents the results of a study on the microstructure of dysprosium hafnate $0.5 \text{Dy}_{\text{2}} \text{O}_3 0.5\text{Hf} \text{O}_2$ after irradiation with heavy and light ions. Tablet samples of the studied material were prepared using traditional powder metallurgy methods (pressing a powder mixture followed by sintering at $1800^{\circ} \text{C}$). Irradiation was carried out sequentially (5 cycles) with $\text{Ni}^{4+}$ ions with an energy of 11.5 MeV and $\text{He}^{+}$ ions with energies of $0.8 - 1.4$ MeV to damaging doses of $20-300$ dpa and helium content of 84 appm He/dpa at $350^{\circ}\text{C}$ and $550^{\circ}\text{C}$. The microstructure was studied using transmission electron microscopy. It has been revealed that radiation-induced porosity is formed in all the studied samples, with the size of pores/bubbles slightly increasing in size and density with increasing the dose and irradiation temperature. The maximum swelling was observed in the sample irradiated up to 300 dpa at $550^{\circ}\text{C}$. The swelling of all samples remains within 0.1\%, which indicates the high radiation resistance of dysprosium hafnate.
References
V. Risovany et al., J. Nucl. Mater. 365, 163 (2006).
R. J. M. Konings, Comprehensive Nuclear Materials (Elsevier, 2012).
P. Ivon, Structural Materials for Generation IV Nuclear Reactors (Woodhead Publishing, London, 2017), 664 p.
M. Staltsov et al., J. Mater. Sci. 61, 1261 (2026).
M. Ayanoglu et al., J. Nucl. Mater. 570, 153944 (2022).
M. Staltsov et al., J. Nucl. Mater. 461, 54 (2015).
J. H. Shin et al., Nucl. Eng. Technol. 55, 555 (2023).
S. Sakib et al., J. Nucl. Mater. 621, 156394 (2026).
Z. Hang et al., J. Nucl. Mater. 494, 165 (2017).
S. Ghyngazov et al., Ceram. Int. 49, 37061 (2023).
J. Wu et al., J. Mater. Sci. Technol. 155, 1 (2023).
G. S. Was et al., J. Nucl. Mater. 616, 156065 (2025).
I. Chernov et al., J. Nucl. Mater. 459, 259 (2015).
M. Staltsov et al., At. Energy 116, 65 (2014).
Q. Feng et al., Appl. Surf. Sci. 703, 163437 (2025).
F. A. Garner, J. Nucl. Mater. 117, 177 (1983).
M. Staltsov et al., Russ. Metall. 2019, 1161 (2019).
I. Chernov et al., Nucl. Mater. Energy 16, 249 (2018).
P. Seo et al., J. Appl. Phys. 132, 235902 (2022).
J.-M. Constantini et al., J. Nucl. Mater. 564, 153667 (2022).
Y. Katoh et al., J. Nucl. Mater. 448, 448 (2014).
X. Su et al., J. Eur. Ceram. Soc. 46, 118167 (2026).
Downloads
Published
Issue
Section
License
Copyright (c) 2026 The Author(s)
This work is licensed under a Creative Commons Attribution 4.0 International License.
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author(s) and source are properly credited.
Authors retain copyright and grant the journal a non-exclusive right of first publication.
