Fretting wear and mechanical properties of surface-nanostructural titanium alloy bone plate
Fretting wear and mechanical properties of surface-nanostructural titanium alloy bone plate
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DOI：
10.1016/j.surfcoat.2020.126512
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Daosheng Wen
中科院分区：
文献类型：
--
作者：
Gaoqi Wang;Shouren Wang;Xuefeng Yang;Xiuchun Yu;Daosheng Wen
Surface-nanostructural TiO 2 coatings on titanium alloy prepared by electrochemical anodic oxidation have shown immense potential on medical implants because of their special nanotube structure and excellent biocompatibility. Great attention has been drawn on the formation mechanism, morphology, wettability, ossi-fication, anti-bacteria, drug delivery, and corrosion-resistance properties of the coatings in the application ofbone plate. However, the relationships among microscope morphology, mechanical and tribological performances of the TiO 2 nanotube coatings were not fully studied. In the present paper, TiO2 nanotube coatings were fabricated on Ti6Al4V substrate by anodic oxidation with voltage of 60 V and different oxidation times. The fretting wear behavior of the bone plate covered with TiO 2 nanotubes was investigated under the condition of simulated body fluid. The mechanical properties of the coatings and their influence on the wear resistance of bone plate were analyzed. Results showed that nanotubes with orderly arrangement and large nanotube size were formed, which are beneficial to the ossification and drug delivery. Prolonging oxidation time from 2 h to 6 h increased the diameter and thickness of nanotubes, and decreased the microhardness and elasticity modulus of the coatings gradually, improving the biomechanical compatibility and wear-resistance. The TiO 2 nanotube coatings on the bone plate surface reduced the friction coefficient and wear volume, because the lower elasticity.and higher hydrophilicity of the coatings improve the lubrication state.
