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Fracture toughness, strength, and other characteristics of yttria-stabilized zirconium ceramics

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Abstract

The mechanical behavior of zirconium ceramics with different porosities (456 and 1330 MPa) is studied with an accent on the fracture toughness (the study of other characteristics in a wide temperature range plays an auxiliary role) The tests are predominantly performed with the use of a Vickers pyramid (theIF andIS methods) and under flexure (theSEVNB andSENB methods) The results of the indentation and subsequent bending of the specimens are used to plot aR-curve that turns out to be plane It is shown that despite the substantial difference in the strength of the studied variants of ceramics their crack resistance differs inconsiderably The values of the critical coefficients of stress intensity determined by various methods for the same ceramics are shown to differ The results obtained are analyzed using the data of a micro-Raman analysis The tests for crack resistance by the method ofSEVNB (bending of a beam with a polishedV-notch) show that the specimens do not undergo a tetragonal-monoclinic phase transformation during the deposition of a stress concentrator

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Authors and Affiliations

  1. Institute for Problems of Strength of the National Academy of Sciences of Ukraine, Kharkov, Ukraine

    G. A. Gogotsi, V. I. Galenko, B. I. Ozerskii, A. D. Vasil’ev & V. I. Korban

  2. Institute for Problems of Materials Science of the National Academy of Sciences of Ukraine, Kharkov, Ukraine

    G. A. Gogotsi, V. I. Galenko, B. I. Ozerskii, A. D. Vasil’ev & V. I. Korban

  3. Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Ukraine

    G. A. Gogotsi, V. I. Galenko, B. I. Ozerskii, A. D. Vasil’ev & V. I. Korban

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  1. G. A. Gogotsi
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  2. V. I. Galenko
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  3. B. I. Ozerskii
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  4. A. D. Vasil’ev
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  5. V. I. Korban
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Transleted from Ogneupory i Technicheskaya Keramika, No. 8, pp. 7 – 13, August, 2000.

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Gogotsi, G.A., Galenko, V.I., Ozerskii, B.I. et al. Fracture toughness, strength, and other characteristics of yttria-stabilized zirconium ceramics. Refract Ind Ceram 41, 257–263 (2000). https://doi.org/10.1007/BF02693761

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