Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Nozzle exit geometry and lump formation in atmospheric plasma spraying
University West, Department of Informatics and Mathematics.ORCID iD: 0000-0003-2535-8132
2005 (English)In: International Thermal Spray Conference: Basel, Switzerland, May, ASM International , 2005, 259-264 p.Conference paper, Published paper (Other academic)
Abstract [en]

Plasma spraying operations performed with high carrier gas flow rate may improve the coating properties but they can also lead to lump formation and thus coating defects. The damaged work piece must then be stripped and re-coated, which implies a considerable waste in terms of coating powder, energy and time. The aim of this study was to determine the cause of the lumps, and propose process modifications for avoiding their formation while keeping the coating quality. Numerical simulations based on 3D turbulent Navier-Stokes equations in local thermal and chemical equilibrium were carried out to understand the problem and estimate the feasibility of the proposed solutions. The computational results were supplemented by experiments for validation. A first set of investigations was focused on the location and orientation of the powder port injector. It turned out that it was not possible to keep the coating quality while avoiding lump formation by simply moving the powder injector. A new geometry of the nozzle exit was then designed and successfully tested for a first application with Ni-5Al powder used in production. 

Place, publisher, year, edition, pages
ASM International , 2005. 259-264 p.
National Category
Other Engineering and Technologies not elsewhere specified
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-2449OAI: oai:DiVA.org:hv-2449DiVA: diva2:317388
Note
From: ITSC 2005: Thermal Spray connects: Explore its surfacing potentialAvailable from: 2010-05-03 Created: 2010-05-03 Last updated: 2014-12-30Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Choquet, Isabelle
By organisation
Department of Informatics and Mathematics
Other Engineering and Technologies not elsewhere specified

Search outside of DiVA

GoogleGoogle Scholar

Total: 166 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf