2020
N.A. Safronova, O.S. Kryzhanovska, M.V. Dobrotvorska, A.E. Balabanov, А.V. Tolmachev, R.P. Yavetskiy, S.V. Parkhomenko, R. Brodskii, V.N. Baumer, D. Yu Kosyanov, O.O. Shichalin, E.K. Papynov, Jiang Li.
Abstract The paper studies infrared-transparent 50:50 vol.% Y2O3–MgO finegrained composite ceramics produced via glycine-nitrate process and spark plasma sintering (SPS). Effect of SPS temperature (T=1100, 1200, 1250 and 1300°С) on consolidation processes of Y2O3–MgO nanopowders and on ceramics properties has been investigated. Morphology, structural-phase state, density, Vickers microhardness and infrared transmittance of Y2O3–MgO nanocomposites have been studied. Transmittance has been found to increase with the SPS temperature reaching 71%@6000 nm wavelength at T=1300°C. Maximal Vickers hardness of 10.9 GPa has been achieved at T=1200°C. The correlation between processing conditions of ceramics and indicated characteristics was investigated.
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