nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2024-4-119-127nuc-760Research ArticleСтатьиИСПОЛЬЗОВАНИЕ СТАБИЛИЗИРУЮЩИХ ДОБАВОК ДЛЯ НАПРАВЛЕННОЙ МОДИФИКАЦИИ И УПРОЧНЕНИЯ Nd2Zr2O7 КЕРАМИКUSE OF STABILIZING ADDITIVES FOR TARGETED MODIFICATION AND HARDENING OF Nd2Zr2O7 CERAMICSКозловскийА. Л.KozlovskiyA. L.

Астана; Алматы

Astana; Almaty

kozlovskiy.a@inp.kzКабиевМ. Б.KabiyevM. B.

Астана

Astana

КенжинаИ. Е.KenzhinaI. E.

Алматы

Almaty

ТоленоваА. У.TolenovaA. U.

Алматы

Almaty

Евразийский национальный университет им. Л.Н. Гумилева; РГП «Институт ядерной физики» МЭ РК; Satbayev UniversityКазахстанL.N. Gumilyov Eurasian National University; RSE “Institute of Nuclear Physics” ME RK; Satbayev UniversityKazakhstanЕвразийский национальный университет им. Л.Н. ГумилеваКазахстанL.N. Gumilyov Eurasian National UniversityKazakhstanРГП «Институт ядерной физики» МЭ РК; Satbayev UniversityКазахстанRSE “Institute of Nuclear Physics” ME RK; Satbayev UniversityKazakhstanSatbayev UniversityКазахстанSatbayev UniversityKazakhstan20243012202404119127Copyright © Козловский А.Л., Кабиев М.Б., Кенжина И.Е., Толенова А.У., 20252025Козловский А.Л., Кабиев М.Б., Кенжина И.Е., Толенова А.У.Kozlovskiy A.L., Kabiyev M.B., Kenzhina I.E., Tolenova A.U.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://journals.nnc.kz/jour/article/view/760

В данной работе представлены результаты экспериментальных работ, связанных с получением Nd2Zr2O7 керамик стабилизированных Y2O3, выбор которых обусловлен большими перспективами использования их в качестве материалов для инертных матриц дисперсного ядерного топлива. В ходе проведенных экспериментов, направленных на определение эффективности влияния стабилизирующих добавок в виде Y2O3 на изменение структурных, прочностных параметров Nd2Zr2O7 керамик было установлено, что увеличение концентрации стабилизирующих добавок выше 0,1 М приводит к формированию в структуре включений в виде зерен Y2Zr2O7, формирование которых связано с эффектами полиморфных трансформаций в диоксиде циркония при высокотемпературном отжиге. Определено, что замещение катионов циркония катионами иттрия приводит к увеличению концентрации кислородных вакансий в составе керамик, изменение концентрации которых также связано с фазовыми трансформациями в структуре, возникающими при больших концентрациях стабилизирующего допанта. При этом оптимальными концентрациями стабилизирующих добавок является концентрация 0,15 М, при которой соотношение структурных, прочностных параметров имеет оптимальные значения, определяющие потенциальное использование их в качестве материалов инертных матриц дисперсного ядерного топлива, обладающих высокими прочностными характеристиками.

This paper presents the results of experimental work related to the preparation of Nd2Zr2O7 ceramics stabilized by Y2O3, the choice of which is due to the great prospects for their use as materials for inert matrices of dispersed nuclear fuel. During the conducted experiments aimed at determining the effectiveness of the influence of stabilizing additives in the form of Y2O3 on the change of structural and strength parameters of Nd2Zr2O7 ceramics it was found that the increase in the concentration of stabilizing additives above 0.1 M leads to the formation of inclusions in the structure in the form of Y2Zr2O7 grains, the formation of which is associated with the effects of polymorphic transformations in zirconium dioxide during high-temperature annealing. It was determined that the substitution of zirconium cations by yttrium cations leads to an increase in the concentration of oxygen vacancies in ceramics composition, the change in the concentration of which is also associated with phase transformations in the structure, arising at high concentrations of stabilizing dopant. At the same time, the optimum concentration of stabilizing additives is the concentration of 0.15 M, at which the ratio of structural and strength parameters has optimum values, determining their potential use as materials of inert matrices of dispersed nuclear fuel with high strength characteristics.

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The authors declare that there are no conflicts of interest present.