This paper investigates the mechanical response of a coated Ti-6Al-4V alloy surface under different sliding contact stress conditions.\nThe surface was coated with an oxide ceramic material created through the use of a recently developed technique known as plasma\nelectrolytic oxidation (PEO). During the PEO procedure, a composition of silicate and phosphate was used as the electrolyte.\nIn order to evaluate the coating, pin-on-disk (POD) tribology tests and cyclic inclined sliding tests were used under dry room\nconditions. Furthermore, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were utilized to examine\nthe morphology and composition of the coating surfaces. The results of the POD tests revealed that the PEO coating could have a\nlow coefficient of friction and suggested that high silicon concentrations in the PEO coatings take away oxygen fromstoichiometric\nTi oxides to create lubricating oxides. In addition, cyclic inclined sliding tests showed that smaller pores on the surface of the coating\ncould permit a higher coating cohesive strength and allow the coated Ti alloy surface to perform better under high inclined sliding\nforces.
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