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Fabrication and microstructure-mechanical property relationships in Ce-TZPs

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Abstract

Ceria-stabilized tetragonal zirconia polycrystals(Ce-TZPs) have been fabricated via conventional sintering of commercially available electrofused and electrorefined CeO2-doped ZrO2 powder at 1550°C for various periods from 0.5–30 h. The resultant grain sizes of the sintered materials were in the range 2–15 μm. The sintering of such electrorefined powder appears to occur by a liquid state sintering process, evinced in terms of the grain-size dependence on sintering time at 1550°C and by direct TEM observation. The mechanical properties of the sintered materials have been characterized, including single-edge notch bend fracture toughness and three-point bend fracture strength. The grain-size dependence of these properties in the CeO2-stabilized tetragonal polycrystals is very much different from that in Y2O3 stabilized tetragonal zirconia polycrystals (Y-TZPs). The transformation plasticity, which is represented by the yield stress behaviour and the total strain to fracture, plays an important role in the microstructure-property interrelationship in the Ce-TZPs.

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Authors and Affiliations

  1. IRC in Materials for High Performance Applications, The University of Birmingham, B15 2TT, Birmingham, UK

    J. Wang

  2. Department of Mechanical Engineering, Bei**g Institute of Technology, Bei**g, People's Republic of China

    X. H. Zheng

  3. School of Materials, The University of Leeds, Leeds, UK

    R. Stevens

Authors
  1. J. Wang
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  2. X. H. Zheng
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  3. R. Stevens
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Wang, J., Zheng, X.H. & Stevens, R. Fabrication and microstructure-mechanical property relationships in Ce-TZPs. J Mater Sci 27, 5348–5356 (1992). https://doi.org/10.1007/BF00553418

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  • DOI: https://doi.org/10.1007/BF00553418

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