Research Article

Fabrication of TiO2 Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments

Table 1

Conditions under which the different samples, thicknesses, and detected crystalline phases were obtained.

Sample ColorAnodizing voltage [V]Conditions of thermal treatment (time [h] and temperature [°C])Thickness 
nm
Crystalline phase of

20Blue20 48a
40Green40 92a
60Pink and yellow60 130b
500Golden1 h, 500°C23a
20-500Blue20 1 h, 500°C48aa + r
40-500Green40 1 h, 500°C100aa + r
60-500Pink and yellow60 1 h, 500°C130ba + r
600Blue1 h, 600°C50cr
20-600Green20 1 h, 600°C92ba + r
40-600Pink and yellow40 1 h, 600°C130ba + r
60-600Dark green and pink 60 1 h, 600°C192ba + r

Values measured by XRR; bcalculated using measured values and oxidation conditions; cestimated value using [12, 13]; da: anatase, r: rutile.