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Characterization of Thermally Oxidized Ti6Al7Nb Alloy for Biological Applications
Huseyin Cimenoglu,Onur Meydanoglu,Murat Baydogan,Hakan Bermek,Pinar Huner,E. Sabri Kayali 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.5
Wear and biological performances of a thermally oxidized Ti6Al7Nb alloy were investigated. Thermal oxidation (TO) performed at 600 °C for 60 h in air formed a 0.6 μm thick and relatively rough (having an average surface roughness of 1.1 μm) oxide layer (OL) on the surface. The OL was identified as the rutile form of TiO_2 and there was an oxygen diffusion zone (ODZ) with an average thickness of 5 μm just beneath it. The applied TO process resulted in more than ten-fold increase in wear resistance in a simulated body fluid (SBF) solution. Additionally, the biological performance was also enhanced as revealed by SBF immersion and cell culture tests.