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Environment and time dependent hardness in zirconia

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Abstract

The microhardness of monoclinic ZrO2 single-crystals was measured in different environments: air, water, and toluene. An indentation creep process at room temperature was observed for the measurements in moist media pointing for a water-activated plastic relaxation mechanism. This effect is discussed employing the models previously proposed to explain similar behaviors in ZrO2 and other nonmetallic materials. A possible correlation with the conditions for the nucleation in phase transitions is proposed.

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Author notes

  1. A. S. Pereira

    Present address: Also with the Departamento de Materials, Escola de Engenharia da UFRGS, Porto Alegre, RS, Brasil

Authors and Affiliations

  1. Also with the Departamento de Materials, Escola de Engenharia da UFRGS, Brasil, Porto Alegre, Brazil

    A. S. Pereira

  2. Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Brasil, 91500-Porto, Alegre, Brazil

    A. S. Pereira & J. A. H. da Jornada

Authors
  1. A. S. Pereira
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  2. J. A. H. da Jornada
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Pereira, A.S., da Jornada, J.A.H. Environment and time dependent hardness in zirconia. Journal of Materials Research 9, 1059–1062 (1994). https://doi.org/10.1557/JMR.1994.1059

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  • DOI: https://doi.org/10.1557/JMR.1994.1059

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