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Study of thestructural and phasestate of ceramicssynthesized from 6YSZ- Al2O3 – HfO2 bysemi–dry pressingfollowed bysintering… : научноеиздание Abilev MadiYerbolat DiasSkakov Mazhyn2024 год

Study of the structural and phase state of ceramics synthesized from 6YSZ - Al2O3 – HfO2 by semi–dry pressing followed by sintering in vacuum : научное издание
статья из журнала

Дополнительные ссылки: eLibrary
База данных: Каталог библиотеки СФУ
Библиографическое описание: Study of the structural and phase state of ceramics synthesized from 6YSZ - Al2O3 – HfO2 by semi–dry pressing followed by sintering in vacuum : научное издание / M. Abilev, D. Yerbolat, M. Skakov [и др.]. - Текст : непосредственный // Вестник Казахского национального университета. Серия химическая. - 2024. - Т. 112, № 3. - С. 12-21. - ISSN 1563-0331. - ISSN 2312-7554, DOI 10.15328/cb1375.
Аннотация: <jats:p>The study investigates the properties of 6YSZ – Al2O3 – HfO2 powder mixture and the resulting ceramics obtained by semi-dry pressing followed by sintering in vacuum. X-ray fluorescence spectrometry revealed the primary constituents as zirconium (81%), aluminum (8.7%), yttrium (5.7%), and hafnium (3.5%). The average particle diameter was 0.5 μm, with specific surface area and bulk weight recorded at 18,535 cm2/g and 0.84 g/cm3, respectively. X-ray phase analysis indicated a predominance of monoclinic zirconium dioxide. Sintering at 1400-1600°C transformed the phase composition, enhancing density and microhardness, with values peaking at 5.8 g/cm3 and 12.1 GPa at 1600°C. This process also increased the tetragonal phase content to 63%. The ceramics exhibited the highest crack resistance at 1600°C, attributed to the stabilized tetragonal zirconium dioxide. Microstructural analysis confirmed the homogenous distribution of the elements and the presence of fine fractions influencing microstructural properties. 1600°C was found to be the optimal temperature for sintering the 6YSZ – Al2O3 – HfO2 ceramics.</jats:p>
Год издания: 2024
Авторы: Abilev Madi, Yerbolat Dias, Skakov Mazhyn, Zhilkashinova Almira, Pavlov Alexandr, Kantay Nurgamit, Gert Sergey, Zhilkashinova Assel, Łatka Leszek
Издательство: Казахский национальный университет им. Аль-Фараби, Алматы
Источник: Вестник Казахского национального университета. Серия химическая
Выпуск: Т. 112, № 3
Номера страниц: 12-21
Количество экземпляров:
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