The Tribological Behavior of Nanocrystalline TiO₂ Coating Produced by Plasma Electrolytic Oxidation

Table 3

Phase and microstructural characteristics of the coatings.

Sample	Anatase (Wt. %)	Rutile (Wt. %)	Average porosity size (μm)	Porosity volume fraction (vol. %)	Average surface roughness (μm)
B	5.45	94.55	0.64	8.12	0.33
B1	3.66	96.34	2.07	9.73	0.44
B2	12.02	78.98	0.98	10.54	0.36
B3	22.2	77.80	2.31	6.86	2.00