STUDY OF STRUCTURAL AND MECHANICAL PROPERTIES OF ZIRCONIUM DIOXIDE REINFORCED MAGNESIUM ALUMINATE CERAMICS

Improving the mechanical properties of technical ceramics is an urgent task of modern ceramic materials science. There is a need to improve the mechanical properties of refractories based on MgAl 2 O 4 spinel, since this spinel is characterized by impeccable resistance to high-temperature corrosion. The work is devoted to studying the microstructure, phase composition and mechanical properties of MgAl 2 O 4 -ZrO 2 ceramics. Experimental samples were synthesized by the solid-phase method from powder compacts. For a comprehensive study of the microstructure and phase composition, scanning electron microscopy and X-ray diffraction were used. The mechanical properties of the ceramic samples were studied by measuring the strength of tablets in biaxial bending. Reinforcement of magnesium aluminate with zirconium dioxide was carried out to improve the mechanical properties of composite ceramics. It was found that a change in the fraction of the press powder can affect the shrinkage, density and mechanical properties of MgAl 2 O 4 -ZrO 2 ceramic samples.