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Deposition of aluminum powder by cold spray micronozzle

  • A. Sova
  • I. Smurov
  • M. Doubenskaia
  • P. Petrovskiy
ORIGINAL ARTICLE
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Abstract

Spatial resolution of cold spray depends on the exit dimension of converging-diverging nozzle used for particle acceleration. Typical diameter of cold spray nozzle lies in the range between 4 and 10 mm. In this study, micronozzle with 0.5 mm throat diameter and 1 mm exit diameter is applied for cold spray deposition of aluminum powder. Numerical simulation and experimental velocity measurements demonstrate that aluminum particles could be accelerated to the velocity sufficient for coating deposition if room temperature helium is applied as working gas. The diameter of spraying spot in this case does not exceed 1.7–1.8 mm that is significantly lower than for standard cold spray nozzle. However, the density and the bond strength of obtained aluminum coating are significantly lower than those for standard cold spray aluminum deposits.

Keywords

Cold spray Optical diagnostics Particle velocity Micronozzle 

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Notes

Acknowledgements

The work was carried out with financial support from the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST «MISiS» (№ К1-2016-030), implemented by the governmental decree dated on 16th of March 2013, N 211.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2017

Authors and Affiliations

  • A. Sova
    • 1
  • I. Smurov
    • 1
  • M. Doubenskaia
    • 1
  • P. Petrovskiy
    • 2
  1. 1.National Engineering School of Saint-Etienne (ENISE), LTDS Laboratory UMR 5513Université LyonSaint-EtienneFrance
  2. 2.National University of Science and Technology (“MISIS”)MoscowRussia

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