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Dependence of ceramic fracture properties on porosity

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Abstract

A connected-grain model developed earlier to study the modulus of elasticity as a power-law of density was extended to study the dependence of the flexural strength of polycrystalline ceramics on porosity. Relations were derived for specific surface fracture energy, fracture toughness and flexural strength as power laws of (1 −p), wherep is porosity. Model validity was confirmed with data on α-alumina, UO2, Si3N4, and the YBa2Cu3O7−δ superconductor.

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Authors and Affiliations

  1. Materials and Components Technology Division, Argonne National Laboratory, 60439, Argonne, IL, USA

    A. S. Wagh, J. P. Singh & R. B. Poeppel

  2. Materials Laboratory, Physics Department, University of the West Indies, Mona Kingston 7, Jamaica, West Indies

    A. S. Wagh

Authors
  1. A. S. Wagh
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  2. J. P. Singh
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  3. R. B. Poeppel
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Wagh, A.S., Singh, J.P. & Poeppel, R.B. Dependence of ceramic fracture properties on porosity. J Mater Sci 28, 3589–3593 (1993). https://doi.org/10.1007/BF01159841

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  • DOI: https://doi.org/10.1007/BF01159841

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