This work reports on the tribological performance of three different commercial hard PVD coatings (TiN, TiCN and nACo) with lubricating extra films of Al2O3, Ni-WS2 and diamond-like carbon (DLC). WC-Co hardmetal has been used as substrate material. Wear tests, employing two counter bodies of Al2O3 and hardmetal WC-Co, were performed for the PVD coatings with and without the extra films. The results showed that the presence of DLC extra film reduces the coefficient of friction of the PVD hard coatings TiN and nACo. Furthermore, the wear of TiN coatings was reduced in the presence of an extra Ni-WS2 lubricant film.
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