Study of Diffusion Expansion of Damaged Layer in Nd2Zr2O7 Ceramics Under High-Temperature Irradiation
Kenzhina I. Kabiyev M. Kozlovskiy A. Begentayev M. Tolenova A. Blynskiy P.
2026Taylor and Francis Ltd.
Fusion Science and Technology
2026#82Issue 1-2461 - 470 pp.
The main aim of this study is to determine the role of irradiation temperature on the mechanisms of softening of the surface layers of Nd2Zr2O7 ceramics, as well as to identify the effect of stabilizing additives on enhancement of the resistance to high-temperature destabilization of the damaged layer. Analysis of the effect of variations in irradiation temperature on the change in the strength properties of Nd2Zr2O7 ceramics and identification of the effect of addition of stabilizing MgO and Y2O3 additives on inhibition of the mechanisms of diffusion expansion of the damaged layer depth revealed that in the case of high-temperature irradiation, the effect of diffusion softening is more pronounced for unstabilized ceramics, while the formation of impurity inclusions in the composition inhibits the mechanisms of diffusion of point and vacancy defects. One of the key parameters for using the addition of stabilizing additives to ceramics is to contain the mechanisms of structural disorder associated with thermodynamic phase transitions of the “pyrochlore → highly defective fluorite” type, the formation of which leads to softening and degradation of the damaged layer. During the studies conducted, it was established that the addition of stabilizing additives to the composition of Nd2Zr2O7 ceramics leads to an increase in resistance to high-temperature degradation of strength properties, consisting in an increase in the threshold for reducing hardness depending on the irradiation temperature for stabilized ceramics in comparison with nonstabilized Nd2Zr2O7 ceramics.
degradation, vacancy defects , diffusion expansion , Nd2Zr2O7 ceramics , radiation damage
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Satbayev University, 22 Satbayev Street, Almaty, 050013, Kazakhstan
The Institute of Nuclear Physics, Laboratory of Solid State Physics, Almaty, 050032, Kazakhstan
L. N. Gumilyov Eurasian National University, Engineering Profile Laboratory, Astana, 010008, Kazakhstan
Al-Farabi Kazakh National University, Institute of Experimental and Theoretical Physics, Almaty, 050040, Kazakhstan
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Satbayev University
The Institute of Nuclear Physics
L. N. Gumilyov Eurasian National University
Al-Farabi Kazakh National University
Kazakh-British Technical University
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