Synthesis, Characterization and Optimization of Electrophoretic Deposition (EPD) Parameters of YSZ Layer on Ti-6Al-4V Alloy substrate

The objective of present work is to study the effect of electrophoretic deposition (EPD) parameters (voltage, time and concentration) using DC current based on the thickness, porosity and coating characterizations of YSZ layer on Ti-6Al-4V alloy substrate. The Taguchi approach was used in order to determine the optimal conditions for EPD and different criteria were applied for the deposit of biochemical coatings. Yttria stabilized zirconia powder (YSZ) was deposited on Ti-6Al-4V alloy substrate by electrophoresis using ethanol as a solvent under DC, to improve the quality of alloy surface and meet the requirements of biological orthopedic application activity. Ethanol was used as solvent to precipitate chitosan and YSZ on the alloy substrate. The composition of the surface and the cross section of coatings have been described by this electrode-enabled cathodic deposition for characterization. Many tests and inspections; zeta potential, water contact angle, XRD, SEM and optical microscopes were used to characterize surface morphology of YSZ layer. Optimum conditions for deposition of YSZ layer were used at 40 volt, 2 min and 1g / l for suspension being at room temperature. The contact angles values of coatings were changed between hydrophilic 67.489°C and 35.914°C Suitable percentages of porosity with pores size of 56.601-83.505 μm were obtained.