nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2026-1-141-150nuc-987Research ArticleСтатьиИЗУЧЕНИЕ РЕАКЦИОННЫХ ФАЗОВЫХ ТРАНСФОРМАЦИЙ В КОМПОЗИТНЫХ (1-x)ZrO2 - xSiC КЕРАМИКАХ ПРИ ИЗМЕНЕНИИ СООТНОШЕНИЯ КОМПОНЕНТ В СОСТАВЕSTUDY OF THE KINETICS OF PHASE TRANSFORMATIONS IN COMPOSITE (1-x)ZrO2 - xSiC CERAMICS WHEN THE RATIO OF COMPONENTS IN THE COMPOSITION CHANGESЕлшибековР. Б.ElshibekovR. B.

Астана

Astana

КозловскийА. Л.KozlovskiyA. L.

Астана

Astana

kozlovksiy.a@inp.kzГиниятоваШ. Г.GiniyatovaSh. G.

Астана

Astana

ЖумажановаА. Т.ZhumazhanovaA. T.

Астана

Astana

ХаметоваА.KhametovaA.

Астана

Astana

Астанинский филиал РГП «Институт ядерной физики» Агентства РК по атомной энергииКазахстанAstana branch RSE “Institute of Nuclear Physics”of the Agency of the RK for Atomic EnergyKazakhstanАстанинский 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”Kazakhstan20262504202601141150Copyright © Елшибеков Р.Б., Козловский А.Л., Гиниятова Ш.Г., Жумажанова А.Т., Хаметова А., 20262026Елшибеков Р.Б., Козловский А.Л., Гиниятова Ш.Г., Жумажанова А.Т., Хаметова А.Elshibekov R.B., Kozlovskiy A.L., Giniyatova S.G., Zhumazhanova A.T., Khametova 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/987

В статье приведены результаты оценки реакционных фазовых трансформаций в композитных (1-x)ZrO2 - xSiC керамиках, связанных с изменением соотношения компонент в составе керамик при термическом спекании. Анализ проводился с применением методов рентгенофазового анализа, рамановской спектроскопии и оптической спектроскопии. Согласно результатам рентгенофазового анализа исследуемых образцов композитных (1-x)ZrO2 - xSiC керамик установлено, что увеличение доли SiC до 0,5 в составе керамик приводит к инициализации реакционных фазовых трансформаций типа m-ZrO2 → SiO2+ZrO2 → t-ZrSiO4, результатом которых является образование тетрагональной фазы циркона. При этом установлено, что формирование фазы циркона происходит за счет термического окисления карбида кремния, в результате которого происходит образование оксида кремния и увеличение концентрации кислородных вакансий в составе керамик. Определено, что при концентрации SiC равной 5,0 М фазовый состав керамик представлен смесью фаз циркона ZrSiO4 и гексагональной SiC фазы с малой примесью оксида кремния SiO2 в составе. Анализ оптических спектров пропускания исследуемых керамик показал, что формирование в составе ZrSiO4 сопровождается ростом кислородных вакансий, а также смещением края фундаментального поглощения.

The paper presents the results of the assessment of reaction phase transformations in composite (1-x)ZrO2–xSiC ceramics associated with a change in the ratio of components in the composition of ceramics during thermal sintering. The analysis was carried out using X-ray phase analysis, Raman spectroscopy and optical spectroscopy methods. According to the results of X-ray phase analysis of the studied samples of composite (1-x)ZrO2–xSiC ceramics, it was established that an increase in the proportion of SiC to 0.5 in the composition of ceramics leads to the initialization of reaction phase transformations of the m-ZrO2 → SiO2+ZrO2 → t-ZrSiO4 type, which result in the formation of the tetragonal phase of zircon. It was established that the formation of the zircon phase occurs due to the thermal oxidation of silicon carbide, which results in the formation of silicon oxide and an increase in the concentration of oxygen vacancies in the composition of ceramics. It was determined that at a SiC concentration of 0.5 M, the phase composition of ceramics is represented by a mixture of zircon ZrSiO4 phases and a hexagonal SiC phase with a small admixture of silicon oxide SiO2 in the composition. An analysis of the optical transmission spectra of the studied ceramics showed that the formation of ZrSiO4 is accompanied by an increase in oxygen vacancies, as well as a shift in the fundamental absorption edge.

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