СИНТЕЗ МНОГОКОМПОНЕНТНЫХ КЕРАМИК ZRO₂:WO₃:AL₂O₃:MGO

В данной работе был исследован фазовый состав и микроструктура многокомпонентных керамик ZrO₂:WO₃:Al₂O₃:MgO в зависимости от концентрации компонентов. Определены зависимости между концентрацией элементов в исходной шихте и фазовым составом, объемной усадкой, плотностью и микроструктурой синтезированных образцов. Методом рамановской спектроскопии установлено, что добавление к исходной матрице ZrO₂:WO₃ смеси Al₂O₃:MgO не приводит к образованию твердого раствора ZrO₂:WO₃:Al₂O₃:MgO. С увеличением содержания Al₂O₃:MgO происходит увеличение объемной усадки и плотности, что может быть связано с образованием жидкой фазы системы WO₃:Al₂O₃ при температуре 1450 °С и, как следствие, более эффективной миграции пор и дефектов к поверхности. Анализ СЭМизображений поперечных сечений полученных образцов показал, что все образцы обладают развитой морфологией с различными формами зерен.

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