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Plasma spraying of ceramic particles in argon-hydrogen D.C. Plasma jets: Modeling and measurements of particles in flight correlation with thermophysical properties of sprayed layers

  • T.B. King Memorial Symposium on Physical Chemistry in Metals Processing In Memory of Thomas B. King
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Abstract

The behavior of alumina or stabilized zirconia particles in flight in Ar−H2 d. c. plasma jets (up to 40 kW) has been studied. Measurement of the temperature distributions in the plasma jets (by emission spectroscopy) has shown the importance of the electrodes and are chamber designs on the length and diameter of the jets. The important cooling effect of the surrounding air has also been shown, and the parameters controlling it have been studied. Modeling of the momentum, mass, and heat transfers between plasma and particles as well as measurements of the trajectory, velocity, surface temperature distributions, and particle evaporation have enabled us to determine the influence of the different paramters, such as size and injection velocity distributions, particle morphology,etc., on the particle molten state upon impact. These calculations and measurements on the particles in flight have been correlated to some physical properties of deposits.

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Authors and Affiliations

  1. Laboratoire Céramiques Nouvelles (UA 320), University of Limoges, 123 Rue Albert Thomas, 87060, Limoges Cedex, France

    P. Fauchais (Professor), M. Vardelle (Associate Professor), A. Vardelle (Associate Professor) & J. F. Coudert (Associate Professor)

Authors
  1. P. Fauchais
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  2. M. Vardelle
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  3. A. Vardelle
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  4. J. F. Coudert
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Additional information

This paper is based on a presentation made in the T.B. King Memorial Symposium on “Physical Chemistry in Metals Processing” presented at the Annual Meeting of The Metallurgical Society, Denver, CO, February, 1987, under the auspices of the Physical Chemistry Committee and the PTD/ISS.

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Fauchais, P., Vardelle, M., Vardelle, A. et al. Plasma spraying of ceramic particles in argon-hydrogen D.C. Plasma jets: Modeling and measurements of particles in flight correlation with thermophysical properties of sprayed layers. Metall Trans B 20, 263–276 (1989). https://doi.org/10.1007/BF02825607

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