nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2026-1-89-100nuc-957Research ArticleСтатьиИЗУЧЕНИЕ ВЛИЯНИЯ ИОННОЙ МОДИФИКАЦИИ НА ПОВЫШЕНИЕ ПРОЧНОСТНЫХ СВОЙСТВ xZnO - (1-x)TiO2 КЕРАМИКSTUDY OF THE INFLUENCE OF IONIC MODIFICATION ON ENHANCEMENT OF THE STRENGTH PROPERTIES OF xZnO - (1-x)TiO2 CERAMICSКозловскийА. Л.KozlovskiyA. L.

Астана

Astana

kozlovksiy.a@inp.kzМухаметжароваР. А.MukhametzharovaR. A.

Астана

Astana

Астанинский филиал РГП «Институт ядерной физики» Агентства РК по атомной энергии; НАО «Евразийский национальный университет им. Л. Н. Гумилева»КазахстанAstana branch RSE “Institute of Nuclear Physics” of the Agency of the RK for Atomic Energy; NJSC “L.N. Gumilyov Eurasian National University”KazakhstanНАО «Евразийский национальный университет им. Л. Н. Гумилева»КазахстанNJSC “L.N. Gumilyov Eurasian National University”Kazakhstan2026250420260189100Copyright © Козловский А.Л., Мухаметжарова Р.А., 20262026Козловский А.Л., Мухаметжарова Р.А.Kozlovskiy A.L., Mukhametzharova R.A.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/957

В работе представлены результаты оценки влияния ионной модификации приповерхностных слоев композитных керамик на основе титанатов на изменение устойчивости к внешним механическим воздействиям. В качестве основного метода модификации композитных керамик был выбран метод облучения ионами О+ с энергией порядка 28 МэВ, флюенсы облучения были выбраны в диапазоне от 1011 до 1014 ион/см2. Согласно полученным данным, изменение соотношение компонент при смешивании приводит к формированию двухфазных керамик, в составе которых основной фазой является ZnTiO3, а также присутствуют примеси в виде ZnO и TiO2 в зависимости от весовых вкладов исходных компонент. Определено, что изменение фазового состава, связанное с увеличением фазы ZnTiO3 в составе приводит к увеличению твердости и устойчивости к растрескиванию, что обусловлено совокупностью изменений фазового состава и размерных эффектов. В ходе экспериментов, связанных с ионной модификацией исследуемых xZnO - (1-x)TiO2 керамик установлено, что при флюенсах облучения 1011–5·1012 ион/см2 наблюдается формирование эффекта упрочнения приповерхностного слоя, обусловленного воздействием ионов на кристаллическую структуру, и связанных с ними эффектами дислокационного упрочнения. При флюенсах выше 5·1012 ион/см2 наблюдается снижение степени упрочнения керамик, связанное с увеличением плотности структурных дефектов, их агломерации и последующей дестабилизации приповерхностного слоя, снижающего сопротивляемость к внешним воздействиям, в том числе и механическому давлению, приводящему к трещинообразованию.

The paper presents the assessment results of the influence of ionic modification of the near-surface layers of composite ceramics based on titanates on changes in resistance to external mechanical influences. The method of irradiation with O+ ions with an energy of about 28 MeV was chosen as the main method for modification of composite ceramics; irradiation fluences were selected in the range from 1011 to 1014 ion/cm2. According to the data obtained, a change in the ratio of components during mixing leads to the formation of two-phase ceramics, in which the main phase is ZnTiO3, and impurities in the form of ZnO and TiO2 are also present, depending on the weight contributions of the initial components. It was determined that the phase composition alteration associated with an increase in the ZnTiO3 phase in the composition results in hardness and cracking resistance growth, which is due to a combination of changes in phase composition and size effects. During experiments related to the ion modification of the studied xZnO - (1-x)TiO2 ceramics, it was established that at irradiation fluences of 1011–5·1012 ion/cm2, the formation of a strengthening effect of the near-surface layer, caused by the effect of ions on the crystal structure, and the associated effects of dislocation strengthening, is observed. At fluences above 5·1012 ion/cm2, a decrease in the degree of strengthening of ceramics, associated with an increase in the density of structural defects, their agglomeration and subsequent destabilization of the near-surface layer, which reduces resistance to external influences, including mechanical pressure, leading to crack formation, is observed.

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