Subramanian B
CSIR--Central Electrochemical Research Institute, Karaikudi 630006, India.
J Nanosci Nanotechnol. 2013 Jul;13(7):4565-72. doi: 10.1166/jnn.2013.7170.
Titanium nitride (TiN)/niobium nitride (NbN) nanostructured multilayer coatings were prepared by DC reactive magnetron sputtering method using the combination of a titanium and niobium target and an Ar-N2 mixture discharge gas on to 316L stainless steel substrates. The coatings showed a polycrystalline structure with (111) for TiN and (101) for NbN preferential growth. Raman spectroscopy measurements on the multilayer films exhibited the characteristic peaks at 212, 303, 458 and 578 cm-1. A higher hardness of 38 GPa was observed for TiN/NbN coatings. Electrochemical polarization tests were performed in simulated biological fluid solutions at 37 degreesC in order to determine and compare the corrosion behavior of the coated and uncoated 316L SS substrates. The TiN/NbN multilayer coatings could improve the corrosion resistance of 316L SS substrate. The bacterial culture experiments were performed and the bacteria treated samples were examined by epi fluorescence microscope measurements.
采用直流反应磁控溅射法，将钛靶和铌靶与氩 - 氮混合放电气体相结合，在316L不锈钢基底上制备了氮化钛（TiN）/氮化铌（NbN）纳米结构多层涂层。涂层呈现多晶结构，其中TiN以（111）面、NbN以（101）面优先生长。对多层膜进行的拉曼光谱测量显示，在212、303、458和578 cm-1处有特征峰。观察到TiN/NbN涂层具有38 GPa的较高硬度。在37℃的模拟生物流体溶液中进行了电化学极化试验，以确定和比较涂层和未涂层的316L SS基底的腐蚀行为。TiN/NbN多层涂层可以提高316L SS基底的耐腐蚀性。进行了细菌培养实验，并通过落射荧光显微镜测量对经细菌处理的样品进行了检查。
