The influence of Al2O3 particle morphology on the coating formation and dry sliding wear behavior of cold sprayed Al–Al2O3 composites

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DOIResolve DOI: http://doi.org/10.1016/j.surfcoat.2015.01.057
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleSurface and Coatings Technology
ISSN0257-8972
Volume270
Pages324333; # of pages: 10
SubjectCold spray; Dry sliding wear; In situ tribometry; Al–Al2O3; Metal matrix composites
AbstractFive Al–Al2O3 coatings were deposited by gas dynamic cold spray, using feedstocks containing 0, 10, and 50 wt.% of Al2O3 particles admixed into commercially pure Al powders. Two feedstocks were made using Al2O3 powders with an angular, blocky Al2O3 morphology, two feedstocks used Al2O3 powders with a spherical morphology, and the fifth consisted of 100% Al. The influence of Al2O3 concentration and morphology in the feedstock powders on the cold spray coating formation was measured in terms of Al2O3 recovery in the coatings, deposition efficiency, and microstructural analysis. The Al–Al2O3 coatings were then subjected to dry sliding wear experiments from which the friction, wear, and microevolution of third body structures in the wear track and transfer film were observed. The spherical Al2O3 morphology was associated with improved tribological behavior compared to the angular morphology when comparing similar coating concentrations of Al2O3.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Automotive and Surface Transportation
Peer reviewedYes
NPARC number21275331
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Record identifier8b53ab91-e6cc-4662-a41d-bda9af871255
Record created2015-06-11
Record modified2017-03-23
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