Phase Composition and Mechanical Properties of Sm2O3 Partially Stabilized Zirconia Crystals
Source abstract
Abstract
The mechanical properties, phase composition and luminescence of (ZrO2)1−x(Sm2O3)x (x = 0.02–0.06) crystals synthesized using directional melt crystallization were studied. The regularities of changes in the phase composition of the crystals depending on samaria concentration were analyzed. Optical spectroscopy showed that Sm ions were incorporated into the ZrO2 crystal lattice in the form of Sm3+. The microhardness of the crystals was shown to increase with Sm2O3 concentration and reached 12.45 GPa for (ZrO2)0.94(Sm2O3)0.06 crystals. The highest fracture toughness of 14.2 MPa∙m1/2 was observed for the crystals containing 3.7 mol.% Sm2O3. The experimental results were analyzed in order to understand the effect of phase composition on the mechanical properties of the crystals. The effect of ionic radii of stabilizing oxide cations (i.e., Y3+, Gd3+ and Sm3+) on the mechanical properties of the materials on the basis of partially stabilized zirconia was also discussed.
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Research context
OpenAlex topics: Nuclear materials and radiation effects · Advanced ceramic materials synthesis · Luminescence Properties of Advanced Materials
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Affiliations
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), 4 Leninskiy Prospekt, 119049 Moscow, Russia
Institute of High Technologies and New Materials, Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia
Funding
Russian Science Foundation
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