Abstract
This study examines the fundamental reactions that occur in-flight during the solution precursor plasma spraying (SPPS) of solutions containing Zr- and Y-based salts in water or ethanol solvent. The effect of plasma jet composition (pure Ar, Ar-H2 and Ar-He-H2 mixtures) on the mechanical break-up and thermal treatment of the solution, mechanically injected in the form of a liquid stream, was investigated. Observation of the size evolution of the solution droplets in the plasma flow by means of a laser shadowgraphy technique, showed that droplet break-up was more effective and solvent evaporation was faster when the ethanol-based solution was injected into binary or ternary plasma gas mixtures. In contrast with water-based solutions, residual liquid droplets were always detected at the substrate location. The morphology and structure of the material deposited onto stainless steel substrates during single-scan experiments were characterised by SEM, XRD and micro-Raman spectroscopy and were shown to be closely related to in-flight droplet behaviour. In-flight pyrolysis and melting of the precursor led to well-flattened splats, whereas residual liquid droplets at the substrate location turned into non pyrolysed inclusions. The latter, although subsequently pyrolysed by the plasma heat during the deposition of entire coatings, resulted in porous “sponge-like” structures in the deposit.
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P. Fauchais, V. Rat, J.-F. Coudert, R. Etchart-Salas, and G. Montavon, Operating Parameters for Suspension and Solution Plasma-Spray Coatings, Surf. Coat. Technol., 2008, 202, p 4309-4317
P. Fauchais, G. Montavon, and G. Bertrand, Influence of Powders on Thermal Spray Coating Structures: Recent Developments in Nano or Finely Structured Coatings and Some Safety Issues, Expanding Thermal Spray Performance to New Markets and Applications, Proceedings of the 2009 International Thermal Spray Conference, B.R. Marple, M.M. Hyland, Y.-C. Lau, C.-J. Li, R.S. Lima, G. Montavon, Ed., May 4-7, 2009 (Las Vegas, NV, USA), ASM International, 2009, p 799-817
D. Chen, E.H. Jordan, and M. Gell, The Solution Precursor Plasma Spray Coatings: Influence of Solvent Type, Plasma Chem. Plasma Process., 2010, 30(1), p 111-119
C.K. Muoto, E.H. Jordan, M. Gell, and M. Aindow, Identification of Desirable Precursor Properties for Solution Precursor Plasma Spray, J. Therm. Spray Technol., 2011, 20(4), p 802-816
L. Pawlowski, Suspension and Solution Thermal Spray Coatings, Surf. Coat. Technol., 2009, 203, p 2807-2829
M. Gell, E.H. Jordan, M. Teicholz, B.M. Cetegen, N.P. Padture, L. Xie, D. Chen, X. Ma, and J. Roth, Thermal Barrier Coatings Made by the Solution Precursor Plasma Spray Process, J. Therm. Spray Technol., 2008, 17(1), p 124-135
H.P. Klug and L.E. Alexander, X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials, Wiley, New York, 1974, p 687
Y.H. Dong and P. Scardi, MarqX: A New Program for Whole-Powder-Pattern Fitting, J. Appl. Crystallogr., 2000, 33, p 184-189
D.L.A. De Faria, S. Venâncio Silva, and M.T. de Oliveira, Raman Microspectroscopy of Some Iron Oxides and Oxyhydroxidess, J. Raman Spectrosc., 1997, 28, p 873-878
J. Cai, C. Raptis, Y.S. Raptis, and E. Anastassakis, Temperature Dependence of Raman Scattering in Stabilized Cubic Zirconia, Phys. Rev. B, 1995, 51(1), p 201-209
L. Bianchi, A. Denoirjean, F. Blein, and P. Fauchais, Microstructural Investigation of Plasma-Sprayed Ceramic Splats, Thin Solid Films, 1997, 299(1-2), p 125-135
C. Veytizou, J.-F. Quinson, and A. Douy, Sol-Gel Synthesis Via an Aqueous Semi-Alkoxide Route and Characterization of Zircon Powders, J. Mater. Chem., 2000, 10, p 365-370
RASMIN database, http://riodb.ibase.aist.go.jp/rasmin/E_ino_sea.htm, last accessed 16/05/2011
J. Li, H. Huang, T. Ma, K. Eguchi, and T. Yoshida, Twin-Structured Yttria-Stabilized t’ Zirconia Coatings Deposited by Plasma Spray Physical Vapor Deposition: Microstructure and Mechanical Properties, J. Am. Ceram. Soc., 2007, 90(2), p 603-607
M.A. Tamor and W.C. Vassel, Raman “Fingerprinting” of Amorphous Carbon Films, J. Appl. Phys., 1994, 76(6), p 3823-3830
V. Rat and J.F. Coudert, A Simplified Analytical Model for D.C. Plasma Torch: Influence of Gas Properties and Experimental Conditions, J. Phys. D Appl. Phys., 2006, 39, p 4799-4807
L. Xie, X. Ma, E.H. Jordan, N.P. Padture, D.T. Xiao, and M. Gell, Deposition of Thermal Barrier Coatings Using the Solution Precursor Plasma Spray Process, J. Mater. Sci., 2004, 39, p 1639-1646
D. Chen, E.H. Jordan, and M. Gell, Effect of Solution Concentration on Splat Formation and Coating Microstructure Using the Solution Precursor Plasma Spray Process, Surf. Coat. Technol., 2008, 202(10), p 2132-2138
R. Vert, P. Carles, E. Laborde, G. Mariaux, E. Meillot, A. Vardelle, Adhesion of Ceramic Coating on Thin and Smooth Metal Substrate: A Novel Approach with a Nanostructured Ceramic Interlayer, J. Therm. Spray Technol., 2012, 21(4)
H. Podlesak, L. Pawlowski, R. d’Haese, J. Laureyns, T. Lampke, and S. Bellayer, Advanced Microstructural Study of Suspension Plasma Sprayed Hydroxyapatite Coatings, J. Therm. Spray Technol., 2010, 19(3), p 657-664
E. Bemporad, G. Bolelli, V. Cannillo, D. De Felicis, R. Gadow, A. Killinger, L. Lusvarghi, J. Rauch, and M. Sebastiani, Structural Characterisation of High Velocity Suspension Flame Sprayed (HVSFS) TiO2 Coatings, Surf. Coat. Technol., 2010, 204(23), p 3902-3910
D. Chen, E. Jordan, and M. Gell, Thermal and Crystallization Behavior of Zirconia Precursor Used in the Solution Precursor Plasma Spray Process, J. Mater. Sci., 2007, 42, p 5576-5580
L.H.J. Wachters and N.A.J. Westerling, The Heat Transfer from a Hot Wall to Impinging Water Drops in the Spheroidal State, Chem. Eng. Sci., 1996, 21(11), p 1047-1056
K. VanEvery, M.J.M. Krane, R.W. Trice, H. Wang, W. Porter, M. Besser, D. Sordelet, J. Ilavsky, and J. Almer, Column Formation in Suspension Plasma-Sprayed Coatings and Resultant Thermal Properties, J. Therm. Spray Technol., 2011, 20(4), p 817-828
A. Bacciochini, J. Ilavsky, G. Montavon, A. Denoirjean, F. Ben-Ettouil, S. Valette, P. Fauchais, and K. Wittmann-Teneze, Quantification of Void Network Architectures of Suspension Plasma-Sprayed (SPS) Yttria-Stabilized Zirconia (YSZ) Coatings Using Ultra-Small-Angle X-Ray Scattering (USAXS), Mater. Sci. Eng. A, 2010, 528(1), p 91-102
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Bertolissi, G., Chazelas, C., Bolelli, G. et al. Engineering the Microstructure of Solution Precursor Plasma-Sprayed Coatings. J Therm Spray Tech 21, 1148–1162 (2012). https://doi.org/10.1007/s11666-012-9789-3
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DOI: https://doi.org/10.1007/s11666-012-9789-3