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Comparison Between High-Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Alumina

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Abstract

Two different spray processes—suspension plasma spraying (SPS) and high-velocity suspension flame spraying (HVSFS)—are under focus in the field of suspension spraying. Both techniques are suitable for manufacturing finely structured coatings. The differences in the particle velocity and temperature of these two processes cause varying coating characteristics. The high particle velocity of the HVSFS process leads to more dense coatings with low porosity values. Coatings with a higher and also homogeneous porosity, which can be generated by SPS, have also high potential, for example, for thermal barrier coatings. In this study, both the processes—SPS and HVSFS—were compared using alumina as feedstock material mixed with different solvents. Besides the characterization of the microstructure and phase composition of the applied coatings, the focus of this study was the investigation of the melting behavior of the particles in-flight and of single splat characteristics.

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Authors and Affiliations

  1. Institute for Manufacturing Technologies of Ceramic Components and Composites, Universität Stuttgart, Stuttgart, Germany

    Philipp Müller, Andreas Killinger & Rainer Gadow

Authors
  1. Philipp Müller
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  2. Andreas Killinger
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  3. Rainer Gadow
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Correspondence to Philipp Müller.

Additional information

This article is an invited paper based on an oral presentation at the 5th International Workshop on Suspension and Solution Thermal Spraying (S2TS) 2011. This workshop was held in Tours, France, October 3-4, 2011 and was organized by CEA Le Ripault.

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Müller, P., Killinger, A. & Gadow, R. Comparison Between High-Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Alumina. J Therm Spray Tech 21, 1120–1127 (2012). https://doi.org/10.1007/s11666-012-9783-9

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  • DOI: https://doi.org/10.1007/s11666-012-9783-9

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