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RMS matrix strains in transformation toughened alumina

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Abstract

The Warren Averbach technique was used to determine the RMS strain profile in the Al2O3 matrix surrounding ZrO2 particles in zirconia toughened alumina. The X-ray domain size was found to be ∼100nm in all but the most severely microcracked sample. The RMS strain, averaged over all domains, decreased nearly linearly from the edge of the domain (presumably from the ZrO2 particle), except when microcracking was detected and then the RMS strain level was reduced near the surface of the domain. The maximum RMS strain level increased with increasing ZrO2 particle size up to the point where microcracking occurred then decreased. The results were explained by noting that the maximum RMS strain was directly related to the monoclinic content of the sample.

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Authors and Affiliations

  1. Lawrence Livermore National Laboratory, University of California, PO Box 808, L-369, 94550, Livermore, CA, USA

    K. R. Wilfinger

  2. Center for Ceramic Research, Rutgers University, Busch Campus, PO Box 909, 08855-0909, Piscataway, New Jersey, USA

    W. R. Cannon

  3. Department of Material Science, Rutgers University, Busch Campus, PO Box 909, 08855-0909, Piscataway, New Jersey, USA

    T. Tsakalakos

Authors
  1. K. R. Wilfinger
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  2. W. R. Cannon
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  3. T. Tsakalakos
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Wilfinger, K.R., Cannon, W.R. & Tsakalakos, T. RMS matrix strains in transformation toughened alumina. J Mater Sci 25, 4401–4404 (1990). https://doi.org/10.1007/BF00581099

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  • DOI: https://doi.org/10.1007/BF00581099

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