Journal of Thermal Spray Technology

, Volume 12, Issue 3, pp 393–402 | Cite as

Deposition of nanoparticle suspensions by aerosol flame spraying: Model of the spray and impact processes

  • T. Poirier
  • A. Vardelle
  • M. F. Elchinger
  • M. Vardelle
  • A. Grimaud
  • H. Vesteghem
Reviewed Papers


Aerosol flame spraying (AFS) combines the atomization of a colloidal suspension with the lateral injection of the aerosol in a flame. The aerosol droplets are partially dried when crossing the flame and then deposited as a coating onto a substrate. Afterwards, the coating is consolidated by heat treatment without extensive grain growth. In this paper a model of the trajectories, acceleration and vaporization of the droplets is used to predict the impact conditions of the in-flight dried droplets, as well as their size and water content when they impinge onto the substrate. From these calculations and the hydrodynamic properties (viscosity, surface tension, contact angle) of the suspensions, the morphology and size of the lamellae deposited on the substrate are determined by using classic impact models. In spite of the complexity of the mixing of the suspension spray with the flame and the diversity of the thermal histories of the droplets, the observation of the latter after impact shows that the results of the model are quite consistent with measurements. The relationship between droplet impact parameters and coating formation is discussed.


colloids flame spraying impact modeling suspension zirconia 


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  1. 1.
    J. Karthikeyan, C. Berndt, S. Reddy, J.-Y. Wang, A. King, and H. Herman: “Nanomaterial Deposits Formed by DC Plasma Spraying of Liquid Feedstocks,” J. Am. Ceram. Soc. 1998, 81(1), pp. 121–28.CrossRefGoogle Scholar
  2. 2.
    A.R. Di Giampaolo, H. Reveron, H. Ruiz, T. Poirier, J. Lira, and H. Vesteghem: “Zirconia Coatings on Stainless Steel by Aerosol Thermal Spraying,” A.T.M, 1998, 1(1), pp. 90–100.Google Scholar
  3. 3.
    T. Poirier: “Zirconia Coatings Manufactured by Aerosol Flame Spraying,” Ph.D. Thesis, Université de Limoges. France, Nb: 49-2000 (in French).Google Scholar
  4. 4.
    H. Vesteghem, A. Lecomte, and A. Dauger: “Film Formation and Sintering of Colloidal Monoclinic Zirconia,” J. Non. Cryst. Solids, 1992, 147, 148, pp. 503–507.CrossRefGoogle Scholar
  5. 5.
    H. Reveron: “Synthesis of Cerium-Partially Stabilized Zirconia,” Ph.D. Thesis, Université de Limoges, France, Nb: 51-2000 (in French).Google Scholar
  6. 6.
    J. Bernardin, C. Stebbins, and I. Mudawar: “Mapping of Impact and Heat Transfer Regimes of Water Drops Impinging on a Polished Surface,” Int. J. Heat Mass Transfer, 1997, 40(2), pp. 247–67.CrossRefGoogle Scholar
  7. 7.
    M. Ciofalo, I. Di Piazza, and V. Brucato: “Investigation of the Cooling of Hot Walls by Liquid Water Sprays,” Int. J. Heat Mass Transfer, 1999, 42, pp. 1157–75.CrossRefGoogle Scholar
  8. 8.
    Z. Liu and R. Reitz: “Modeling Fuel Spray Impingement and Heat Transfer Between Spray and Wall in Direct Injection Diesel Engines,” Numerical Heat Transfer, Part A, 1995, 28, pp. 515–29.Google Scholar
  9. 9.
    W.J. Yang: “Natural Convection in Evaporating Droplets” in Handbook of Heat and Mass Transfer, Vol. I, Heat Transfer Operations, N.P Cheremesinoff, ed., Golf Publishing Co., Houston, 1986, pp. 211–28.Google Scholar
  10. 10.
    J. Fukai, Y. Shiiba, and O. Miyatake: “Theoretical Study of Droplet Impingement on a Solid Surface Below the Leidenfrost Temperature,” Int. J. Heat Mass Transfer, 1997, 40(10), pp. 2490–92.CrossRefGoogle Scholar
  11. 11.
    V. Sobolev: “Formation of Splat Morphology During Thermal Spraying,” Materials Letters, 1998, 36, pp. 123–127CrossRefGoogle Scholar
  12. 12.
    M. Pasandideh-Fard, J. Mostaghimi, and S. Chandra: “3D Model of Droplet Impact and Solidification: Impact on a Solidified Splat” in Proceedings of the 14th International Symposium on Plasma Chemistry, M. Hrabovský, M. Konrád, and V. Kopecký, ed., Institute of Plasma Physics, Prague, 1999, pp. 2081–87.Google Scholar
  13. 13.
    A.C. Léger: “Experimental Study of Splat Formation and Residual Stresses in Plasma-Sprayed Coatings,” Ph.D. Thesis, Université de Limoges, France, Nb: 4-1997 (in French).Google Scholar
  14. 14.
    J.J. Bikerman, Physical Surfaces, Academic Press, London, United Kingdom, 1970, pp. 16–19.Google Scholar
  15. 15.
    K. Masters: Spray Drying, 2nd ed., J. Wiley, New York, 1976, pp. 206–84.Google Scholar
  16. 16.
    H. Ruiz: Technical Report, Surface and Interface Engineering Group, Universidad Simon Bolivar, Caracas, Venezuela, 1995.Google Scholar
  17. 17.
    P. Arques: Inflammation, Combustion, Pollution, Masson, Paris, France, 1992, pp. 6–11.Google Scholar
  18. 18.
    A. Vardelle: “Modeling of the Heat, Mass and Momentum Transfers Between DC Plasma Jets and Particles,” D.Sc. State Thesis, University of Limoges, France, Nb 27–87, 1987.Google Scholar
  19. 19.
    S. Schiaffino and A. Sonin: “Molten Droplet Deposition and Solidification at Low Weber Numbers,” Phys. Fluids, 1997, 9, pp. 3172–87.CrossRefADSGoogle Scholar
  20. 20.
    J. Madejski: “Solidification of Droplets on a Cold Surface,” Int. J. Heat Mass Transfer, 1976, 19, pp. 1009–1013.MATHCrossRefADSGoogle Scholar
  21. 21.
    L. Bianchi: “DC and RF Plasma Spraying of Ceramic Coatings: Mechanisms of Formation of the First Layer and Relationship With the Mechanical Properties of the Coating,” Ph.D. Thesis, Université de Limoges, Nb: 41-1995 (in French).Google Scholar
  22. 22.
    C. Mundo, M. Sommerfeld, and C. Tropea: “Droplet-Wall Collisions: Experimental Studies of the Deformation and Break-up Process,” Int. J. Multiphase Flow, 1995, 21(2), pp. 151–73.CrossRefGoogle Scholar
  23. 23.
    J. Senda, M. Kobayashi, S. Iwashita, and H. Fujimoto: “Modeling of Diesel Spray Impinging on Flat Wall,” JSME Int. J., Series B., 1996, 39(4), pp. 859–86.Google Scholar
  24. 24.
    J. Bernardin and I. Mudawar: “Film Boiling Heat Transfer of Droplet Streams and Sprays,” Int. J. Heat Mass Transfer, 1997, 40(11), pp. 2579–93.CrossRefGoogle Scholar

Copyright information

© ASM International 2003

Authors and Affiliations

  • T. Poirier
    • 1
  • A. Vardelle
    • 2
  • M. F. Elchinger
    • 2
  • M. Vardelle
    • 2
  • A. Grimaud
    • 2
  • H. Vesteghem
    • 3
  1. 1.Universidad Simon BolivarCaracasVenezuela
  2. 2.University of LimogesLimogesFrance
  3. 3.Ecole Nationale Supérieure de Céramique IndustrielleLimogesFrance

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