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Al2O3/Al Cermets by Plasma Spraying: Optical Response of Experimental and Numerically Represented Materials

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Abstract

Optical properties of plasma-sprayed coatings and numerically represented samples were studied at wavelengths ranging from visible to mid-infrared. The paper focuses on Al2O3 and Al2O3/Al cermet coatings with different metal concentrations. Microstructure and composition of the samples were characterized in order to explain their optical response that is highly dependent on volume and/or surface scattering as a function of the wavelength range. 2D scanning electron microscopy and 3D x-ray microtomography images were exploited to get statistical data in order to numerically represent simplified samples from the complex microstructure of plasma-sprayed coatings. A Monte Carlo ray-tracing model, based on geometrical optical laws, was then applied to reproduce experimental trends of the acquired optical spectra. Good agreement with the experimental data was obtained.

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Acknowledgments

The authors are grateful to E. Boller and her team (ESRF-ID19, Grenoble) for their support during XMT data acquisition.

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Authors and Affiliations

  1. CEA DAM, Le Ripault, Monts, France

    D. Toru, A. Quet, H. Piombini & L. Bianchi

  2. CNRS-CEMHTI UPR 3079, Orléans, France

    R. Echegut, D. De Sousa Meneses, L. del Campo & P. Echegut

Authors
  1. D. Toru
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  2. R. Echegut
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  3. A. Quet
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  4. D. De Sousa Meneses
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  5. L. del Campo
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  6. H. Piombini
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  7. P. Echegut
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  8. L. Bianchi
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Corresponding author

Correspondence to A. Quet.

Additional information

This article is an invited paper selected from presentations at the 2015 International Thermal Spray Conference, held on May 11-14, 2015, in Long Beach, California, USA, and has been expanded from the original presentation.

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Toru, D., Echegut, R., Quet, A. et al. Al2O3/Al Cermets by Plasma Spraying: Optical Response of Experimental and Numerically Represented Materials. J Therm Spray Tech 25, 384–391 (2016). https://doi.org/10.1007/s11666-015-0353-9

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  • DOI: https://doi.org/10.1007/s11666-015-0353-9

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