Sprays Used for Thermal Barrier Coatings

  • P. Fauchais
  • M. Vardelle
  • A. Vardelle
  • S. Goutier
Part of the Energy, Environment, and Sustainability book series (ENENSU)


“Nano-sized” or “nano-structured” materials correspond to particle diameters or an internal structure with at least one dimension smaller than 100 nm. The thermal spray community has been actively involved in this area for more than 30 years. Due to the large volume fraction of the internal interfaces, nano-structured coatings exhibit better properties, especially toughness, thanks to crack arresting effect. However, nano-sized particles can be injected in plasma jets only with a liquid carrier as either suspensions (Suspension Plasma Spray, SPS) of nanometer-sized particles or solutions (Solution Plasma Spray Process, SPPS) of reacting elements forming particles. However, a few problems must be solved:
  • How droplets and sub-micrometer particles behave in spray jets and what are the measuring tools available?

  • Is it possible to follow the formation of splats with particles below a few micrometers?

  • How optimizing the liquid injection and its matching with the spray torch?

  • What is the interest to spray coatings with mixtures of micrometer and nanometer-sized particles?

Among the different coatings studied many works have been related to thermal barrier coatings (TBCs) to compete, at lower price, with Electron Beam-Physical Vapor Deposition (EB-PVD) or Plasma Spray-Physical Vapor Deposition (PS-PVD) and also to achieve TBCs with a better resistance to Ca50Mg10Al10Si30 (CMAS).



Advanced Plasma Gun


Atmospheric Plasma Spraying




Direct Current


Double Ceramic Layer Coatings


Electron Beam-Physical Vapor Deposition


Gas-to-Liquid Mass Ratio


Gadolinium Zirconate


High Velocity Oxy-Fuel


Inter-Pass Boundaries






Lanthanum Zirconate (La2Zr2O7)


Optimized Functionally Graded Coating


Particle Image Velocimetry


Plasma Sprayed-Physical Vapor Deposition


Single Ceramic Layer Coatings


Suspension Plasma Spraying


Solution Precursor Plasma Spraying


Stokes Number


Thermal Barrier Coatings


Thermal Expansion Coefficient


Thermally Grown Oxide


Ultra-Small-Angle X-rays Scattering


Weber Number




Yttria Stabilized Zirconia


Ohnesorge Number


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • P. Fauchais
    • 1
  • M. Vardelle
    • 1
  • A. Vardelle
    • 1
  • S. Goutier
    • 1
  1. 1.SPCTS UMR CNRS 7315European Center of Ceramics, University of LimogesLimogesFrance

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