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The use of Al-Al₂O₃ cold spray coatings to improve the surface properties of magnesium alloys

journal contribution
posted on 2009-10-01, 00:00 authored by K Spencer, Daniel FabijanicDaniel Fabijanic, M X Zhang
Pure Al and 6061 aluminium alloy based Al 2 O 3 particle-reinforced composite coatings were produced on AZ91E substrates using cold spray. The strength of the coating/substrate interface in tension was found to be stronger than the coating itself. The coatings have corrosion resistance similar to that of bulk pure aluminium in both salt spray and electrochemical tests. The wear resistance of the coatings is significantly better than that of the AZ91 Mg substrate, but the significant result is that the wear rate of the coatings is several decades lower than that of various bulk Al alloys tested for comparison. The effect of post-spray heat treatment, the volume fraction of Al 2 O 3 within the coating and of the type of Al powder used in the coatings on the corrosion and wear resistance was also discussed.

History

Journal

Surface and coatings technology

Volume

204

Issue

3

Pagination

336 - 344

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0257-8972

Language

Eng.

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2009, Elsevier