Effects of voltage on the components of surface integrity of Al2O3 ceramic coatings on AA2024 by plasma electrolytic oxidation

Reza Matin, Yasar Totik, Ebru Emine Sukuroglu, Ihsan Efeoglu, Telmo G. Santos

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


It is said that plasma electrolytic oxidation (PEO) is considered as an effective technique to boost the surface properties of light materials by means of forming ceramic films on their surfaces. In this study, three different voltage values were applied to the PEO process to AA2024 so that Al2O3 ceramic coatings were directly supplied for AA 2024 substrates by PEO and it is focused on the adhesion of interface between coating and substrate. All of the cases such as microstructure, phase composition, thickness, roughness and hardness of Al2O3 ceramic coatings were assayed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Atomic-force microscopy (AFM), Eddy Current Non-destructive testing and microhardness test, respectively. The results showed that roughness, hardness and thickness of the coatings were increased as we increased the voltage. Therefore, it could be claimed that the voltage parameters have an important role in the unified coating on the metal surface as it is directly connected with the morphologies of the PEO coating.

Original languageEnglish
Pages (from-to)1971-1981
Number of pages11
JournalJournal Of Adhesion Science And Technology
Issue number18
Publication statusPublished - 16 Sep 2020


  • AlO ceramic coatings
  • non-destructive testing
  • plasma electrolytic oxidation (PEO)
  • voltage value


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