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Microprobe fluorescence spectroscopy evaluation of stress fields developed along a propagating crack in an Al2O3/CaO 6Al2O3ceramic composite

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Abstract

The fracture behavior upon stable crack propagation in bending was investigated for a ceramic matrix composite comprising 15 vol% of calcium hexaluminate (CaAl12O19 or “CA6”) in an Al2.O3 matrix and compared to the crack bridging stresses as measured by microprobe fluorescence spectroscopy. In addition, piezospectroscopy coefficients of -4.57 and -3.79 cm-1 GPa-1 were determined for the peaks located at 14488 and 14528 cm-1, respectively, for monolithic CA6. It was concluded that the macroscopic R-curve behavior of the composite could be predicted from microscopic bridging stress data and indicated microprobe fluorescence spectroscopy to be a significant experimental tool for the investigation of fracture micromechanisms in ceramic materials.

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Authors and Affiliations

  1. Dipartimento di Ingegneria dei Materiali, University of Trieste, Via Valerio 2, 34127, Italy

    O. Sbaizero

  2. Dipartimento di Scienze e Tecnologie Chimiche, University of Udine, Via del Cotonificio 108, 33100, Italy

    S. Maschio

  3. Ceramic Physics Laboratory, Department of Materials, Kyoto Institute of Technology, 606-8585, Matsugasaki, Sakyo-Ku, Kyoto, Japan

    G. Pezzotti

  4. Advanced Fibro-Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-Ku, Kyoto, 606-8585, Japan

    I. J. Davies

Authors
  1. O. Sbaizero
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  2. S. Maschio
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  3. G. Pezzotti
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  4. I. J. Davies
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Corresponding author

Correspondence to G. Pezzotti.

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Sbaizero, O., Maschio, S., Pezzotti, G. et al. Microprobe fluorescence spectroscopy evaluation of stress fields developed along a propagating crack in an Al2O3/CaO 6Al2O3ceramic composite. Journal of Materials Research 16, 2798–2804 (2001). https://doi.org/10.1557/JMR.2001.0385

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  • DOI: https://doi.org/10.1557/JMR.2001.0385

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