Wear Resistance of Plasma Electrolytic Oxidation Coatings on Ti-6Al-4V Eli Alloy Processed by Additive Manufacturing

The additive manufacturing (AM) technique can produce Ti-6Al-4V ELI (extra low interstitial) alloy for personalized biomedical devices. However, the presents poor tribological behavior. Regarding this, coatings are a feasible approach to improve wear resistance of this alloy. In literature, behavior TiO2 incorporated with Ca and P formed by one-step plasma electrolytic oxidation (PEO) on processed AM has not been investigated. Thus, in present work, it was studied influence morphologic coating obtained PEO (plasma oxidation). way, three different voltages (200, 250, 300 V) were employed process voltage effect properties coatings. characterized contact profilometry, scanning electron microscopy, energy-dispersive spectroscopy, sessile drop method, grazing-incidence X-ray diffraction, tests, ball-on-plate tribometer. increase applied promoted an roughness, pore area, decrease population addition, coatings, mainly composed anatase rutile, showed good adhesion metallic substrate, presence bioactive elements detected. thickness increases drastically higher than 250 V (from 4.50 ± 0.33 23.83 1.5 µm). lower presented thin dense layers, which superior (increase rate from 1.99 × 10−6 2.60 10−5 mm3/s). Finally, compared uncoated increased titanium AM, also showing commercial previously evaluated, being such positive promising application area implants.