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Liquid Precursor Plasma Spraying: Modeling the Interactions Between the Transient Plasma Jet and the Droplets

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Abstract

Plasma spraying using liquid feedstock makes it possible to produce thin coatings (<100 μm) with more refined microstructures than in conventional plasma spraying. However, the low density of the feedstock droplets makes them very sensitive to the instantaneous characteristics of the fluctuating plasma jet at the location where they are injected. In this study, the interactions between the fluctuating plasma jet and droplets are explored by using numerical simulations. The computations are based on a three-dimensional and time-dependent model of the plasma jet that couples the dynamic behaviour of the arc inside the torch and the plasma jet issuing from the plasma torch. The turbulence that develops in the jet flow issuing in air is modeled by a large Eddy simulation model that computes the largest structures of the flow which carry most of the energy and momentum.

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Authors and Affiliations

  1. Laboratoire Sciences des Procédés Céramiques et Traitements de surface, University of Limoges, ENSIL, Limoges, France

    C. Marchand, C. Chazelas, G. Mariaux & A. Vardelle

Authors
  1. C. Marchand
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  2. C. Chazelas
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  3. G. Mariaux
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  4. A. Vardelle
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Corresponding author

Correspondence to A. Vardelle.

Additional information

This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.

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Marchand, C., Chazelas, C., Mariaux, G. et al. Liquid Precursor Plasma Spraying: Modeling the Interactions Between the Transient Plasma Jet and the Droplets. J Therm Spray Tech 16, 705–712 (2007). https://doi.org/10.1007/s11666-007-9112-x

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  • DOI: https://doi.org/10.1007/s11666-007-9112-x

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