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Influence of the Spray Angle on the Characteristics of Atmospheric Plasma Sprayed Hard Material Based Coatings

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Abstract

This paper presents an investigation of the influence of the spray angle on thermally sprayed coatings. Spray beads were manufactured with different spray angles between 90 and 20° by means of atmospheric plasma spraying (APS) on heat-treated mild steel (1.0503). WC-12Co and Cr3C2-10(Ni20Cr) powders were employed as feedstock materials. Every spray bead was characterized by a Gaussian fit. This opens the opportunity to analyze the influence of the spray angle on coating properties. Furthermore, metallographic studies of the surface roughness, porosity, hardness, and morphology were carried out and the deposition efficiency as well as the tensile strength was measured. The thermally sprayed coatings show a clear dependence on the spray angle. A decrease in spray angle changes the thickness, width, and form of the spray beads. The coatings become rougher and their quality decreases.

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Acknowledgment

This work is supported by the German Research Foundation (DFG) within the Research Centre SFB708.

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Authors and Affiliations

  1. Institute of Materials Engineering, Technical University of Dortmund, Leonhard-Euler-Str. 2, 44227, Dortmund, Germany

    Wolfgang Tillmann, Evelina Vogli & Benjamin Krebs

Authors
  1. Wolfgang Tillmann
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  2. Evelina Vogli
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  3. Benjamin Krebs
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Corresponding author

Correspondence to Wolfgang Tillmann.

Additional information

This article is an invited paper selected from presentations at the 2008 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Thermal Spray Crossing Borders, Proceedings of the 2008 International Thermal Spray Conference, Maastricht, The Netherlands, June 2-4, 2008, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2008.

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Tillmann, W., Vogli, E. & Krebs, B. Influence of the Spray Angle on the Characteristics of Atmospheric Plasma Sprayed Hard Material Based Coatings. J Therm Spray Tech 17, 948–955 (2008). https://doi.org/10.1007/s11666-008-9261-6

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  • DOI: https://doi.org/10.1007/s11666-008-9261-6

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