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Structure and mechanical properties of crystals of partially stabilized zirconia after thermal treatment

  • Mechanical Properties, Physics of Strength, and Plasticity
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Abstract

The phase composition and morphology of the twin structure of the Y2O3-stabilized zirconia crystals (from 2.8 to 4.0 mol %) after the thermal treatment at 1600°C have been investigated by X-ray diffractometry and transmission electron microscopy. It is shown that as the concentration of the stabilizing Y2O3 impurity increases, the character of the twin structure changes, and the amount of the untransformed phase t′ increases. The dependence of the hardness and crack resistance of the crystals of partially stabilized zirconia on the Y2O3 concentration and the indenter orientation is investigated using the microindentation method. The sample with the lowest concentration of the stabilizing Y2O3 impurity turned out the most crack resistant. This can be explained by a high content of tetragonal phase t in it, which provides the transformation strengthening mechanism of the material, and by a more multilevel character of twinning.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    M. A. Borik, A. V. Kulebyakin, E. E. Lomonova, V. A. Myzina & V. V. Osiko

  2. National University of Science and Technology “MISiS,”, Leninskii pr. 4, Moscow, 119049, Russia

    V. T. Bublik, F. O. Milovich, S. V. Seryakov & N. Yu. Tabachkova

Authors
  1. M. A. Borik
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  2. V. T. Bublik
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  3. A. V. Kulebyakin
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  4. E. E. Lomonova
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  5. F. O. Milovich
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  6. V. A. Myzina
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  7. V. V. Osiko
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  8. S. V. Seryakov
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  9. N. Yu. Tabachkova
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Corresponding author

Correspondence to F. O. Milovich.

Additional information

Original Russian Text © M.A. Borik, V.T. Bublik, A.V. Kulebyakin, E.E. Lomonova, F.O. Milovich, V.A. Myzina, V.V. Osiko, S.V. Seryakov, N.Yu. Tabachkova, 2013, published in Fizika Tverdogo Tela, 2013, Vol. 55, No. 8, pp. 1578–1584.

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Borik, M.A., Bublik, V.T., Kulebyakin, A.V. et al. Structure and mechanical properties of crystals of partially stabilized zirconia after thermal treatment. Phys. Solid State 55, 1690–1696 (2013). https://doi.org/10.1134/S1063783413080052

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  • DOI: https://doi.org/10.1134/S1063783413080052

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