Synthesis and Study of Composite Materials in the ZrO2(Y2O3)–MgAl2O4 System


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Powders–precursors of a tetragonal solid solution based on partially stabilized zirconium dioxide (t-ZrO2) and aluminum-magnesium spinel (MgAl2O4) are synthesized using the method of the cocrystallization of solutions of nitrate salts from which nanocrystalline (<100 nm) composite materials are fabricated at 1400°C in the ZrO2(Y2O3)–MgAl2O4 system with an open porosity of 3%. The structure, physical–mechanical properties, and thermal stability of the nanocomposites are investigated. It is established that the introduction of MgAl2O4 into the matrix of the solid t-ZrO2 solution increases the thermal resistance of the ceramics under the thermal cycling conditions (20–1000°С). The effect of thermal cycling on the phase composition, hardness, and bending strength of the ceramics in the ZrO2(Y2O3)–MgAl2O4 system is investigated.

作者简介

L. Morozova

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: morozova_l_v@mail.ru
俄罗斯联邦, St. Petersburg, 199034

I. Drozdova

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences

Email: morozova_l_v@mail.ru
俄罗斯联邦, St. Petersburg, 199034

M. Kalinina

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences

Email: morozova_l_v@mail.ru
俄罗斯联邦, St. Petersburg, 199034

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