Optimisation of stainless steel cold spray coatings using mixed particle size distributions

Spencer, K. and Zhang, M.-X. (2011) Optimisation of stainless steel cold spray coatings using mixed particle size distributions. Surface and Coatings Technology, 205 21-22: 5135-5140. doi:10.1016/j.surfcoat.2011.05.020

Author Spencer, K.
Zhang, M.-X.
Title Optimisation of stainless steel cold spray coatings using mixed particle size distributions
Journal name Surface and Coatings Technology   Check publisher's open access policy
ISSN 0257-8972
Publication date 2011-08-25
Sub-type Article (original research)
DOI 10.1016/j.surfcoat.2011.05.020
Volume 205
Issue 21-22
Start page 5135
End page 5140
Total pages 6
Place of publication Lausanne, Switzerland
Publisher Elsevier
Language eng
Formatted abstract
Porosity in type 316 L stainless steel cold spray coatings is studied from two different aspects. The first is to examine, for a given level of porosity, the effect of coating thickness on corrosion behaviour. Beyond a critical coating thickness the substrate is no longer attacked in polarisation tests, which has implications for coatings that contain some porosity (including some thermal spray coatings). The second aspect examined is to approximate the stainless steel particles as non-deforming, and apply the powder metallurgy practice of mixing particle size distributions to improve coating density. The results show that coatings sprayed using mixed particle size distributions can have similar properties to those sprayed using fine particles alone, but without the processing difficulties of fine particles such as inconsistent powder feeding or nozzle fouling.

Research highlights: ► We address the issue of porosity in austenitic stainless steel coatings. ► These particles undergo little deformation on impact. ► With a small level of porosity, coatings beyond a critical thickness are protective. ► Mixing particle size distributions reduces coating porosity. ► This is a more practical approach than spraying with fine particles.
Keyword Cold spray
Kinetic metallization
Particle size
Stainless steel
Deposition characteristics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 32 times in Scopus Article | Citations
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Created: Sun, 18 Sep 2011, 10:01:35 EST by System User on behalf of Materials