BR21882237 " Development and investigation of advanced composite materials for the power energy and fuel cycle"
Relevance
The results obtained during the implementation of the Program will contribute to the development of high-tech production capabilities at Kazakhstani industrial enterprises, create reasonable prerequisites for the commercialization and further development of technologies for the production of new composite materials, within the framework of the developed approaches and methods of material processing. The scientific effect of the program is due to the acquisition of new experimental data on the properties of new composite materials.; identification of new mechanisms and models describing the interaction of the studied materials with active media at high temperatures.
Purpose
The main goal of the program is to develop technological solutions in the field of creating new composite materials for energy and the fuel cycle, their characterization and testing under conditions simulating the conditions of their actual operation, as well as modeling the processes of high-temperature destruction and gas swelling.
Expected and achieved results
Sorption/desorption experiments were carried out and the parameters of the interaction of hydrogen with berylliides Be2Zr , Be3Nb and Be2Nb3 were determined in the temperature range of samples 300-973 K at hydrogen pressures from 103 to 80 · 105 Pa, relative to which the parameters of the interaction of hydrogen were obtained, namely, the temperature dependence of the solubility of hydrogen in the studied materials. Before conducting the experiments, the initial hydride-forming saturation of the sample was performed. It turned out that the highest solubility of hydrogen in the temperature range of 300-600 K is observed in samples of niobium beryllium Nb3Be2, slightly less in zirconium beryllium, and much less in beryllium Be3Nb (more than 100 times less). As a result, new experimental data were obtained on changes in the partial pressures of the gas phase in the chamber above the test samples, depending on the effects of factors such as temperature and the presence of hydrogen-containing impurities. The dynamics of phase transformations in xSi3N4 – (1-x) is establishedZrO2 ceramics, the general form of which can be written as ZrO2/ZrSiO4 → ZrSiO4/fine SiO2 fraction. It has been established that the addition of Si3N4 to ZrO2 ceramics makes it possible to initiate polymorphic transformations of the m-ZrO2 → t-ZrSiO4 type, the formation of which, in combination with a fine SiO2 fraction, leads to the hardening of ceramics and an increase in their resistance to external influences.
Research team members with their identifiers (Scopus Author ID, Researcher ID, ORCID, if available) and links to relevant profiles
1 Scientific supervisor Kenzhina Inesh Ergazievna (kenzhina@physics.kz )
2 Performer Zaurbekova Zhanna Askhatovna zaurbekova@nnc.kz
3 Performer Askerbekov Saulet Kanybekuly askerbekov@physics.kz
4 The performer of Kulsartov Timur Valikhanov tima@physics.kz
5 Performer Kozlovsky Artem Leonidovich artem88sddt@mail.ru
6 Performer Blynsky Peter Alexandrovich blynskiy89@mail.ru
7 Performer Tolenova Akhtolkyn Userbekkyzy aktolkyntolen@gmail.com8
8 Performer Yeleshenkov Alexander Borisovich aleksandrelisenkov282@gmail.com
List of publications with links to them
- Kenzhina I. et al. Effect of dislocation density-associated strengthening factors on the thermal stability of composite ceramics //Physical Sciences and Technology. – 2024. – Т. 11. – №. 1-2. – С. 23-31.
- Кенжина И. Е., Козловский А. Л., Толенова А. У. Изучение влияния размерных эффектов в xSi3N4–(1-x) ZrO2 керамиках, полученных твердофазным методом на прочностные характеристики //Вестник. Серия Физическая (ВКФ). – 2024. – Т. 88. – №. 1. – С. 49-56.