Influence of the Change of Phase Composition of (1 − x)ZrO2–xAl2O3 Ceramics on the Resistance to Hydrogen Embrittlement
Kenzhina I.E. Kozlovskiy A.L. Begentayev M. Tolenova A. Askerbekov S.
November 2023Multidisciplinary Digital Publishing Institute (MDPI)
Materials
2023#16Issue 22
The article describes the influence of the change in the phase composition of ceramics on the stability of the crystal structure and retention of thermo-physical parameters during hydrogenation of the surface layer in the proton irradiation process. The selection of irradiation conditions allows modeling the degradation processes of ceramics associated with gas swelling during hydrogenation, as well as revealing the patterns of the effect of phase composition on embrittlement, de-strengthening, and structural degradation resistance. In the course of the conducted studies, dose-dependencies of irradiation-induced structural changes and consecutive accumulation of radiation-induced damage in ceramics as a result of hydrogenation of the damaged near-surface layer were established. It was found that the maximum structural changes are observed at doses above 1015 protons/cm2. Dependencies of the change in the degree of structural order as a function of the dose of accumulated damage and the concentration of accumulated protons were obtained. It was established that the variation of the ceramics phase composition due to the formation of solid solutions of ZrO2/Al2O3 and ZrO2/Al2O3/AlZr3 type leads to an enhancement of resistance to swelling by 3–5 times in comparison with monoclinic ZrO2 ceramics. The general analysis of the variation of strength and thermo-physical parameters of ceramics as a function of irradiation fluence for ceramics with different phase compositions showed a direct dependence of the decrease in hardness, resistance to cracking, and thermal conductivity on the concentration of deformation structural distortions caused by irradiation.
hydrogen embrittlement , oxide ceramics , radiation damage , swelling , thermo-physical properties
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Department of General Physics, Satbayev University, 22 Satbayev Street, Almaty, 050013, Kazakhstan
Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty, 050040, Kazakhstan
Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Laboratory of Advanced Electronics Development, Kazakh-British Technical University, 59 Tole Bi Street, Almaty, 050000, Kazakhstan
Department of General Physics
Institute of Experimental and Theoretical Physics
Laboratory of Solid State Physics
Laboratory of Advanced Electronics Development
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