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Corrosion resistance of AlN monolayer and Al/AlN multilayer deposited by filtered cathodic vacuum arc

  • Wenling Xie
  • , Yiman Zhao
  • , Shunian Chen
  • , Bin Liao*
  • , Sam Zhang
  • , Qingsong Hua
  • , Guangyu He
  • *Corresponding author for this work
  • Beijing Normal University
  • Sichuan University of Science & Engineering
  • Southwest University
  • Air Force Engineering University Xian

Research output: Contribution to journalArticlepeer-review

Abstract

The AlN monolayer and (Al/AlN)5 multilayer coatings were deposited on AZ31 magnesium alloys by filtered cathodic vacuum arc technology. The AlN monolayer showed a dense structure, but there were some holes at the coating/substrate interface. The (Al/AlN)5 multilayer showed a compact layered structure and the holes were interrupted by the Al/AlN interface. Both AlN monolayer and (Al/AlN)5 multilayer provided excellent corrosion resistance for magnesium alloys, with low corrosion current density of 1.91 × 10−6 and 1.11 × 10−6 A/cm2, respectively. Better corrosion resistance of the (Al/AlN)5 multilayer is attributed to its denser layered structure, better adhesion strength, better crack propagation resistance, and deformation coordination between coating and substrate during corrosion.

Original languageEnglish
Article number139762
JournalThin Solid Films
Volume772
DOIs
StatePublished - 1 May 2023
Externally publishedYes

Keywords

  • Aluminum
  • Aluminum nitride
  • Corrosion resistance
  • Filter cathodic vacuum arc
  • Magnesium alloy
  • Multilayer

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