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Improving Powder Injection in Plasma Spraying by Optical Diagnostics of the Plasma and Particle Characterization

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Abstract

Powder injection parameters such as gas flow, injection angle, and injector position strongly influence the particle beam and thus coating properties. The interaction of the injection conditions on particle properties based on DPV-2000 measurements using the single-cathode F4 torch is presented. Furthermore, the investigation of the plasma plume by emission computer tomography is described when operating the three-cathode TriplexPro™ torch. By this imaging technology, the three-dimensional shape of the radiating plasma jet is reproduced based on images achieved from three CCD cameras rotating around the plume axis. It is shown how the formation of the plasma jet changes with plasma parameters and how this knowledge can be used to optimize particle injection.

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Authors and Affiliations

  1. Institut für Energieforschung (IEF-1), Forschungszentrum Jülich GmbH, Jülich, Germany

    Georg Mauer, Robert Vaßen & Detlev Stöver

  2. Institut für Plasmatechnik und Mathematik IPM (LPT), Universität der Bundeswehr München, München, Germany

    Stefan Kirner, José-Luis Marqués, Stephan Zimmermann, Günter Forster & Jochen Schein

Authors
  1. Georg Mauer
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  2. Robert Vaßen
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  3. Detlev Stöver
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  4. Stefan Kirner
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  5. José-Luis Marqués
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  6. Stephan Zimmermann
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  7. Günter Forster
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  8. Jochen Schein
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Corresponding author

Correspondence to Georg Mauer.

Additional information

This article is an invited paper selected from presentations at the 2010 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Thermal Spray: Global Solutions for Future Applications, Proceedings of the 2010 International Thermal Spray Conference, Singapore, May 3-5, 2010, Basil R. Marple, Arvind Agarwal, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2011.

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Mauer, G., Vaßen, R., Stöver, D. et al. Improving Powder Injection in Plasma Spraying by Optical Diagnostics of the Plasma and Particle Characterization. J Therm Spray Tech 20, 3–11 (2011). https://doi.org/10.1007/s11666-010-9577-x

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  • DOI: https://doi.org/10.1007/s11666-010-9577-x

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