AP23489285 " Investigation of two-phase lithium ceramics degradation processes as a result of hydrogenation and helium swelling"

Relevance

The relevance of the project is due to the need to develop radiation-resistant materials for advanced nuclear power plants, where lithium-containing ceramics are considered as promising target materials for the production of tritium. Studying the processes of hydrogenation and helium swelling in Lialo – Li₂zro₃ ceramics allows for a deeper understanding of the mechanisms of degradation of materials under conditions of intense radiation exposure, which is critically important for improving their performance and durability.

Purpose

study of the processes of hydrogenation and helium swelling in lithium–containing two-phase LiAlO2 - Li2ZrO3 ceramics

Expected and achieved results

The results and novelty (in Russian): a series of samples of LiAlO2 – Li2ZrO3 ceramics were obtained using the method of mechanochemical solid-phase synthesis, by varying the ratio of the components, the changes in which determine the dependences of changes in strength and thermophysical parameters due to the structural features of each component. It is determined that changes in the ratio of components in the composition of ceramics due to an increase in the content of LiAlO2 in the composition makes it possible to increase the thermal conductivity, the change in which is due to the thermophysical parameters of LiAlO2, which has higher thermal conductivity compared with lithium zircon. The dependence of the porosity change on the concentration of the components, the change of which has a direct effect on the strength parameters, is determined. The scientific novelty of the project is determined by obtaining new data on the processes of flooding and helium swelling in lithium–containing LiAlO2 - Li2ZrO3 ceramics, characterizing the processes of accumulation of radiolysis products and structural distortions caused by the accumulation of vacancy defects in the near-surface damaged layer.

Research team members with their identifiers (Scopus Author ID, Researcher ID, ORCID, if available) and links to relevant profiles