Characterization of Anatase Phase on Calcinated Titanium-V Alloy

Abstract

Surface modification of titanium implants has been a large focus of recent research. Thermal oxidation is a technique used to diffuse oxygen into the surface of a material to form an oxide layer. By varying the temperature of thermal oxidation, the crystal structure of the TiO2 layer can be changed from anatase to rutile in the range 300 to 600 °C. The crystal structure of anatase has been shown to resemble hydroxyapatite, a mineral that is involved in bone growth. FTIR, an Ellipsometer, and a Geoniometer are used to analyse the anatase concentrations created at 24, 300, 375, and 450 °C. It was found that hydrophilicity increases on rough samples as oxidation temperature increases. Also, a peak shift from anatase to rutile is seen as annealing temperatures increase in the range of 300 to 600 °C. Greater relative anatase formation is seen at 300 and 375 °C. The shift to rutile begins to occur at 450 °C and continues to 600 °C.

A general mathematical form and description of contact angles

“…The intrinsic contact angle was estimated from separate experiments on non‐acid‐etched smooth (r m ˜ 1.2) electropolished cp titanium as a dynamic contact angle of θ 0 ˜ 73°. In agreement with this experiment a similar value of 72° ± 9° on smooth, non‐acid‐etched Ti 6 Al 4 V samples with a non‐annealed, amorphous TiO 2 ‐layer (<10 nm) was obtained by others . The vector plot and corresponding calculations by eq.…”