Study of phase formation mechanisms in composite xSi3 N4 – (1-x)ZrO2 ceramics and their role in hardening of ceramics
Kenzhina I.E.
20 December 2024al-Farabi Kazakh State National University
International Journal of Mathematics and Physics
2024#15Issue 223 - 33 pp.
The article presents the results of studies of phase transformation dynamics in composite xSi3 N4 – (1-x)ZrO2 ceramics obtained using the mechanical activation method during thermal annealing of the obtained mixtures of components with different component ratios, leading to the initialization of phase formation processes. Using the X-ray phase analysis method, dynamics of phase transformations in xSi3 N4 – (1-x)ZrO2 ceramics, the general appearance of which may be written as ZrO2 /ZrSiO4 → ZrSiO4 /finely dispersed fraction of SiO2, was established. It was found that addition of Si3 N4 to ZrO2 ceramics allows for the initiation of polymorphic transformations of the type m-ZrO2 → t-ZrSiO4, the formation of which in combination with the finely dispersed fraction of SiO2 leads to hardening of the ceramics and a resistance elevation thereof to external influences. During the conducted experimental work, aimed at study of the effect of the phase polymorphic transformation processes in composite ceramics, caused by the component ratio alteration, on resistance to mechanical loads, It was established that the formation of a finely dispersed fraction of SiO2 in ceramics’ structure increases resistance to cracking by more than 1.5 times compared to single-component ceramics, the stability of which decreases in the case of the compression rate growth.
composite ceramics , dispersion hardening , finely dispersed fraction , nanosized grains , phase transformations
Text of the article Перейти на текст статьи
Satbayev University, Institute of Nuclear Physics, Almaty, Kazakhstan
Satbayev University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026