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

SURFACE & COATINGS TECHNOLOGY

卷:270

Article

Shockley, J. M.¹  Descartes, S.^1,2  Vo, P.³  Irissou, E.³  Chromik, R. R.¹ 

[1] McGill Univ, Dept Min & Mat Engn, Aluminum Res Ctr REGAL, Montreal, PQ H3A 0C5, Canada

[2] Univ Lyon, CNRS, INSA Lyon, LaMCoS,UMR5259, F-69621 Villeurbanne, France

[3] Natl Res Council Canada, Boucherville, PQ J4B 6Y4, Canada

关键词: Cold spray;    Dry sliding wear;    In situ tribometry;    Al-Al2O3;    Metal matrix composites;   

DOI  :  10.1016/j.surfcoat.2015.01.057

来源: Elsevier

【 摘 要 】

Five 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. Crown Copyright (C) 2015 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

【 授权许可】

Free