Journal of Thermal Spray Technology

, Volume 20, Issue 1, pp 3–11

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

  • Georg Mauer
  • Robert Vaßen
  • Detlev Stöver
  • Stefan Kirner
  • José-Luis Marqués
  • Stephan Zimmermann
  • Günter Forster
  • Jochen Schein
Peer Reviewed

DOI: 10.1007/s11666-010-9577-x

Cite this article as:
Mauer, G., Vaßen, R., Stöver, D. et al. J Therm Spray Tech (2011) 20: 3. doi:10.1007/s11666-010-9577-x

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.

Keywords

computer tomography diagnostics DPV-2000 plasma spraying powder injection TriplexPro™ 

Copyright information

© ASM International 2010

Authors and Affiliations

  • Georg Mauer
    • 1
  • Robert Vaßen
    • 1
  • Detlev Stöver
    • 1
  • Stefan Kirner
    • 2
  • José-Luis Marqués
    • 2
  • Stephan Zimmermann
    • 2
  • Günter Forster
    • 2
  • Jochen Schein
    • 2
  1. 1.Institut für Energieforschung (IEF-1), Forschungszentrum Jülich GmbHJülichGermany
  2. 2.Institut für Plasmatechnik und Mathematik IPM (LPT), Universität der Bundeswehr MünchenMünchenGermany