Abstract
The TiSiN/Cu nano-multilayer coatings were deposited on Ti6Al4V substrate by multi-arc ion plating. The distribution and diffusion of Cu were controlled by the designed thickness of Cu layer and TiSiN barrier layer. Anti-bacterial behaviors and anti-fouling properties of TiSiN/Cu multilayer coatings were investigated. The TiSiN/Cu multilayer coating consists of nano-crystalline TiN and amorphous Si3N4. The metallic copper presents as nanosize clusters. When the copper layer thickness is 97.10 nm, the TiSiN/Cu coating with the maximum hardness 40.39 ± 0.77 GPa has the best antifouling behavior with the reduction rate of 79.36%, 66.21% and 41.37% for the P. triceratium, N. closterium and chlorella, respectively. Meanwhile, the TiSiN/Cu multilayer coatings have an excellent anti-bacterial behavior against Escherichia coli and Bacillus sp.
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