RT Journal Article T1 Review of plasma electrolytic oxidation of titanium substrates: Mechanism, properties, applications and limitations A1 Aliofkhazraei, M. A1 Macdonald, D.D. A1 Matykina, Endzhe A1 Parfenov, E.V. A1 Egorkin, V.S. A1 Curran, J.A. A1 Troughton, S.C. A1 Sinebryukhov, S.L. A1 Gnedenkov, S.V. A1 Lampke, T. A1 Simchen, F. A1 Nabavi, H.F. AB The plasma electrolytic oxidation is an innovative method for the surface treatment of titanium and its alloys. This review provides an overview of the historical development of the process and summarizes the current state of the art. The chemical as well as the electro- and plasma-chemical basics of the layer forming mechanisms, which comprises the substrate/electrolyte interface before discharge initiation and the different types and stages of plasma electrolytic discharge phenomena are explained within the context of titanium-based materials. How these phenomena can be influenced by the use of suitable electrolytes and controlled by the electrical regime is described. Subsequently, the microstructures and composition of the layers are described in detail, and the properties for specific applications are then discussed. The resistance of a PEO coating to corrosive environments, tribological factors, and alternating mechanical stress is viewed critically, and the extensive functional properties such as physiological compatibility, photocatalytic activity, and decorative properties are revealed. Finally, examples of various practical applications in the medical engineering, aviation, automotive, and environmental technology fields, as well as other branches of industry, are presented. PB Elsevier SN 2666-5239 YR 2021 FD 2021-07-21 LK https://hdl.handle.net/20.500.14352/4747 UL https://hdl.handle.net/20.500.14352/4747 LA eng NO Ministerio de Ciencia e InnovaciĆ³n (MICINN)/FEDER NO Comunidad de Madrid/FEDER NO Russian Science Foundation DS Docta Complutense RD 6 abr 2025