Investigation of HVOF spraying on magnesium alloys

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dc.contributor.authorParco, Maria
dc.contributor.authorZhao, Lidong
dc.contributor.authorZwick, Jochen
dc.contributor.authorBobzin, Kirsten
dc.contributor.authorLugscheider, Erich
dc.contributor.institutionEXTREMAT
dc.date.accessioned2024-07-24T12:02:06Z
dc.date.available2024-07-24T12:02:06Z
dc.date.issued2006-12-04
dc.description.abstractMagnesium alloys are promising alternatives to other lightweight alloys such as aluminum alloys due to their high specific strength and stiffness. However, the use of magnesium alloys is limited by their poor wear behaviour and corrosion performance. Recent studies have shown an enormous potential of thermal spray techniques for the surface modification of Mg alloys. The high particle velocities and moderate temperatures achieved by the High Velocity Oxy-Fuel (HVOF) flame spray process lead to very dense coatings with outstanding wear behaviour and superior bond strengths in comparison to other thermal spray processes. In this study, two Mg alloys AZ91 and AE42 were coated using the HVOF spray process. The substrates were compared in terms of the measured bond strength and the observed adhesion mechanisms of the coating. Furthermore, the coatings were characterized concerning their corrosion performance on AZ91 substrates. It was found that dense WC-Co coatings could be applied on Mg alloy substrates using the HVOF spray process. The high kinetic energy of the WC-Co particles led to a "self roughening" effect on the substrate, enabling the deposition on polished Mg alloy substrates. The coatings showed a very good adhesion to the substrates. The corrosion tests showed that the unsealed WC-Co coatings could not improve the corrosion performance of Mg alloys. In contrast, the duplex coating system with an Al bond coat improved significantly the corrosion resistance of Mg alloys. The sealed coatings showed a very good corrosion behaviour.en
dc.description.sponsorshipThe investigations were promoted from funds of the German Federal Ministry of Economic Affairs and Employment via the Federation of Industrial Research Associations (AiF No. 13.769 N) and were supported by the Research Association for Welding and Allied Processes of the DVS. We would like to record our appreciation of this promotion and support.
dc.description.statusPeer reviewed
dc.format.extent6
dc.identifier.citationParco , M , Zhao , L , Zwick , J , Bobzin , K & Lugscheider , E 2006 , ' Investigation of HVOF spraying on magnesium alloys ' , Surface and Coatings Technology , vol. 201 , no. 6 , pp. 3269-3274 . https://doi.org/10.1016/j.surfcoat.2006.06.047
dc.identifier.doi10.1016/j.surfcoat.2006.06.047
dc.identifier.issn0257-8972
dc.identifier.urihttps://hdl.handle.net/11556/3217
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=33751251679&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofSurface and Coatings Technology
dc.relation.projectIDFederation of Industrial Research Associations
dc.relation.projectIDThe Ministry of Economic Affairs and Employment, MEAE
dc.relation.projectIDAllianz Industrie Forschung, AiF, 13.769 N
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsCorrosion
dc.subject.keywordsHVOF
dc.subject.keywordsMagnesium
dc.subject.keywordsWear
dc.subject.keywordsGeneral Chemistry
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsSurfaces and Interfaces
dc.subject.keywordsSurfaces, Coatings and Films
dc.subject.keywordsMaterials Chemistry
dc.titleInvestigation of HVOF spraying on magnesium alloysen
dc.typejournal article
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