Study of mechanisms of stabilization and increase of resistance to accumulation of radiation damage by varying the composition of components in composite ceramics ZrO2- WO3
Giniyatova S.G. Shlimas D.I. Borgekov D.B. Burkhanov B.Z. Kozlovskiy A.L.
November 2025Elsevier Ltd
Ceramics International
2025#51Issue 2651584 - 51595 pp.
The work is devoted to study of the prospects for using ZrO2– WO3ceramics as radiation-resistant high-strength composite ceramics, which are one of the candidate materials for use as inert matrix materials for new-generation nuclear fuel, requiring high resistance to radiation damage, alongside maintenance of the stability of properties under high mechanical loads. During the studies conducted, the relationship between alterations in the phase composition in ZrO2– WO3ceramics on resistance to high-temperature irradiation with heavy ions was determined, and factors that have a positive effect on enhancement of resistance to the radiation-induced damage accumulation in the near-surface layer were identified. According to the data obtained, it was established that the formation of the tungstate Zr(WO4)2phase in the composition of ceramics leads to the inhibition of embrittlement processes in the case of high-dose irradiation due to the inhibition of thermal expansion, which leads to a slowdown in the diffusion of defects in the damaged layer, as well as inhibition of defect formation processes. It has been determined that the presence of the Zr(WO4)2phase in the composition of ceramics in the case of high-temperature irradiation has a positive effect on inhibition of thermally induced softening processes, which is expressed in a decrease in the degree of degradation of strength properties. At the same time, an assessment of the applicability of these ceramics as shielding materials showed that a change in the phase composition due to the WO3concentration growth in the composition of the ceramics leads to an increase in the shielding ability of the ceramics. Moreover, in the case of high-dose irradiation, the shielding efficiency reduction is minimal in comparison with unmodified ZrO2ceramics, which makes it possible to conclude that composite ceramics have the potential to be used not only as materials for inert matrices, but also as shielding materials.
Composite ceramics , Hardening , Radiation damage , Resistance to destruction , Thermal expansion under irradiation
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Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana, 010008, Kazakhstan
Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Agrarian and Technical University Named After Zhangir Khan», St. Zhangir Khan 51, Uralsk, 090009, Kazakhstan
Engineering Profile Laboratory
Laboratory of Solid State Physics
Agrarian and Technical University Named After Zhangir Khan»
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