Structural and wear behavior of coatings formed on AA7075 aluminum alloy by plasma electrolytic oxidation


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KARAOĞLU S. , SONUVAR E.

PAMUKKALE UNIVERSITY JOURNAL OF ENGINEERING SCIENCES-PAMUKKALE UNIVERSITESI MUHENDISLIK BILIMLERI DERGISI, vol.23, no.4, pp.405-410, 2017 (Journal Indexed in ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 4
  • Publication Date: 2017
  • Doi Number: 10.5505/pajes.2016.24434
  • Title of Journal : PAMUKKALE UNIVERSITY JOURNAL OF ENGINEERING SCIENCES-PAMUKKALE UNIVERSITESI MUHENDISLIK BILIMLERI DERGISI
  • Page Numbers: pp.405-410

Abstract

In this study, ceramic coatings were deposited on 7075 Al alloy using a plasma electrolytic oxidation (PEO) technique. Effects of current density and electrolyte content on microstructure, thickness, surface roughness and wear behavior of PEO coatings were studied. The microstructure and phase composition of the coatings were investigated by SEM and XRD analyses. Dry sliding wear tests, micro hardness and surface roughness measurements were also performed. It was found that the thickness, microhardness, surface roughness and wear resistance of the coatings increased with an increase of current density during plasma electrolytic oxidation.