Surface Morphology of Highly Ordered Nanotube Formed and Laser Textured Beta Titanium Alloys

The aim of the present study is to produce and characterize a well-controlled surface texture on Ti–35Nb-xHf alloys to promote osseointegration. Ti–35Nb–xHf (x = 0, 3, 7 and 15 wt.%) alloys were prepared by arc melting and heat treated for 12 hr at 1000 C in an argon atmosphere and then water quenching. For surface texturing, an amplified Ti: sapphire laser system was used for generating 184 femtosecond (FS, 10−15 sec) laser pulses with the pulse energy over 30 mJ at a 1 kHz repetition rate with a central wavelength of 800 nm. The nanotube formation was achieved by anodizing a Ti–35Nb–xHf alloy in H3PO4 electrolytes containing 0.8 wt.% NaF at room temperature. The surface morphology of nano/micro structure will enhance osseointegration and cell adhesion.