Significant influence of particle surface oxidation on deposition efficiency, interface microstructure and adhesive strength of cold-sprayed copper coatings

Wen Ya Li, Chang Jiu Li, Hanlin Liao

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

The critical velocity for particle deposition in cold spraying is a key parameter, which depends not only on the material type, but also the particle temperature and oxidation condition. The dependency of deposition efficiency of cold spray Cu particles on the particle temperature and surface oxidation was examined. The effect of particle surface oxide scales on the interfacial microstructure and adhesive strength of the cold-sprayed Cu coatings was investigated. The results show that the deposition efficiency significantly increases with increasing the gas temperature but decreases with augmenting the oxygen content of the starting powder. The oxide inclusions at the interfaces between the deposited particles inhibit the effective bonding of fresh metals and remarkably lower the bond strength of the deposited Cu coatings on steel.

Original languageEnglish
Pages (from-to)4953-4958
Number of pages6
JournalApplied Surface Science
Volume256
Issue number16
DOIs
StatePublished - 1 Jun 2010

Keywords

  • Adhesive strength
  • Cold spraying
  • Copper coatings
  • Critical velocity
  • Oxidation

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