Influence of helium and nitrogen gases on the properties of cold gas dynamic sprayed pure titanium coatings

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DOIResolve DOI: http://doi.org/10.1007/s11666-010-9568-y
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TypeArticle
Journal titleJournal of Thermal Spray Technology
Volume20
Issue1-2
Pages213226; # of pages: 14
Subjectcold spray; gun traverse speed; helium; nitrogen; substrate temperature; titanium; XPS
AbstractThis study investigates the effect of propellant gas, helium, and nitrogen during cold spraying of titanium coatings. Coatings were characterized by SEM and were evaluated for their deposition efficiency (DE), microhardness, and porosity. In selected conditions, three particle velocities were investigated in which for each condition, the propelling gases’ temperature and pressure were attuned to attain similar particle velocities for each gas. Observations show that loosely bonded particles can be detached by high-pressure supersonic gas stream. Selected coatings were characterized by XPS to analyze the occurrence of oxidation and nitridation. Although generally accepted that coating characteristics can be affected by particle temperature, results show that for the same particle velocity, DE and coating density are also a function of substrate temperature. In addition, a thick and fully dense cold sprayed titanium coating was achieved with optimized spray parameters and nozzle using helium. The corresponding average particle velocity was 1173 m/s.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number53819
NPARC number16907860
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Record identifiere552615e-d931-4cc1-910c-d6d8147b1a7e
Record created2011-03-06
Record modified2016-05-09
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