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Determination of the ATZ ceramics with different SiO2 contents tensile strength by the "brazilian test" method
Russian version
DOI: 10.21883/PSS.2022.08.54621.355
Dmitrievskiy A.A. 1, Zhigacheva D.G.1, Efremova N.Yu.1, Ovchinnikov P.N.1, Vasyukov V.M.1
1Tambov State University, Tambov, Russia
Email: aadmitr@yandex.ru
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The possibility of using the "Brazilian test" method to determination the tensile strength sigmat of composite zirconia ceramics small-size samples were demonstrated and the reliability of the obtained sigmat values were confirmed. It was found that the dependence of the tensile strength of alumina toughened zirconia (stabilized by calcium oxide) with silica addition (CaO-ATZ + SiO2 ceramics) on SiO2 concentration in them has a maximum (sigma_t=450 MPa, at CSiO_2=5 mol.%). The observed toughened is explained by an increase in the transformability of the tetragonal t-ZrO2 phase and, accordingly, by an enhanced role of transformation toughening when SiO2 is adding into the ATZ ceramics. Keywords: ATZ ceramic, tensile strength, "Brazilian test", phase transformations, transformation toughening.
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