Wear resistance of smooth TiO2 coating obtained by anodic oxidation and sol-gel dip-coating combination - Research Data & Supplemental Files

The data represents the results of wear tests using a reciprocating ball-on-flat equipment. The counterpart was a conical, hemispherical tip with a radius of 10 microns. The counterpart oscillated at 0.7 Hz with an amplitude of 4 mm. The loads applied were 39, 78, 117, and 156 mN for 1, 2, 3, and 4 minutes, respectively. The tests were conducted at 22 ± 2 °C, with 40 ± 10% humidity, and without lubrication.
The tests were performed on:
-Two samples of Ti-6Al-4V (TI-1 and TI-2)
-Two samples of Ti-6Al-4V coated with compact and crystalline TiO2, with a thickness of approximately 100 nm (TSS-1 and TSS-2).
-Four samples of Ti-6Al-4V coated with crystalline and semicompact TiO2, with a thickness of approximately 600 nm (TASS-1, TASS-2, TASS-3 y TASS-4).
All surfaces had the same roughness: Ra = 50 nm (measured with a profilometer) and Ra = 15 nm (measured with an AFM).
For each wear scar, the following measurements were taken:
-The width of the wear scar (2r)
-The penetration of the counterpart (d)
-The volume of wear (V).