TiSiN/Ag纳米多层涂层的抗菌及摩擦学性能研究

Antibacterial and Tribological Properties of TiSiN/Ag Nano-Multilayer Coating

采用多弧离子镀技术,在Ti-6Al-4V合金表面沉积TiSiN/Ag纳米多层涂层和TiSiN涂层,研究沉积涂层的结构、抗菌及摩擦学性能.利用X射线衍射仪(XRD),X射线光电子能谱仪(XPS)和透射电子显微镜(TEM)表征涂层的成分和结构,用纳米压痕仪测试涂层的硬度.采用Rtec往复式摩擦磨损试验机对涂层在海水环境中的摩擦学性能进行研究,评价了涂层对大肠埃希氏菌和枯草芽孢杆菌的抗菌性能.结果表明:与TiSiN涂层相比,TiSiN/Ag多层涂层表现出较低的摩擦系数;两种涂层在海水中磨损率远小于Ti-6Al-4V基底,其中,TiSiN/Ag多层涂层比TiSiN涂层在海水环境中表现出较低的磨损率;对TiSiN/Ag多层涂层进行24 h抗菌试验后,该涂层对大肠杆菌和枯草芽孢杆菌的抑菌率分别达到99.98%和100%.

To study the antibacterial and tribological properties of TiSiN/Ag nano-multilayer coating, TiSiN/Ag nanomultilayer coating and TiSiN coating were deposited on Ti-6Al-4V alloy in a closed field multi-arc ion plating system. A variety of technologies have been employed to characterize the coatings, including X-ray diffraction, scanning electron microcopies, X-ray photoelectron spectroscopy, transmission electron microscope, nanoindentation. The tribological tests of TiSiN/Ag nano-multilayer coating were undertaken in artificial seawater on a ball-on-disc Rtec instrument and the antibacterial efficiency was characterized through measuring the growth status of microbial cells of Escherichia coli and Bacillus subtilis. The results show that the fiction coefficient of the TiSiN/Ag nano-multilayer coating in seawater was lower than TiSiN coating. The wear rate of TiSiN/Ag multilayer coating and TiSiN coating were much less than Ti-6Al-4V substrate, what’s more, TiSiN/Ag nano-multilayer coating was found to have excellent wear resistance. The results of antibacterial efficiency of TiSiN/Ag nano-multilayer coating revealed that the mortality of Escherichia coli and Bacillus subtilis after 24 h were 99.89% and 100%.