The effect of electrochemical parameters on the morphology and microstructure of electrodeposited nano YSZ on stainless steel

Ceramic coating are widely used to protect the metallic components of the hot sections of aerospace and land-based gas turbines against the high temperature environment.Thermal barrier coatings (TBCs) consisting of 7-8wt.%Y2O3 stabilized ZrO2 (YSZ) play a critical role in the performance and reliability of modern gas turbine engines [1].At present, there are two principle methods to apply thermal barrier coatings, one is plasma spraying and the other is electron beam physical vapor deposition(EB-PVD), these techniques have some important limitations[2]. Recently, a few works have investigated the use of electrochemical methods to fabricate ceramic/metal coatings.Gal-Or al produced a ceramic composite coating of titanium and zirconium oxide.The zirconia coat was deposited on a titanium substrate from an aqueous solution with zirconyl salt [3].Aries used the electrolytic method to fabricate an alumina barrier on stainless steel [4] .Electrochemical method is low cost method by which the morphology and structure of the coating can be controlled,The aim of This paper is to investigate the effect of electrochemical parameters on the microstructure of nanoYSZ coating.This study demonstrated that the electrochemical deposition method can be used for production of nano YSZ coatings on stainless steel, and The very compact nanostructure YSZ have been prepared by cyclic voltametric(the process where by metal oxide can be deposited on a cathode in an aqueous solution of the metal salt during cyclic process) on stainless steel as a new method, The overall cyclic conditions/parameters used to deposit the nanostructured YSZ coating were developed . This method is developed to deposit homogeneous and adherent YSZ layers on stainless steels, The surface morphorogy have been characterized by Scanning Electron Microscopy(SEM