Abstract

Tribological properties of TiN and CrN coatings deposited by cathodic arc method at three different bias potentials -50, -150 and -300V on Ti-6Al-4V alloy in pair with alumina have been investigated. The wear rate of the coatings is more than an order of magnitude lower than for the titanium alloy substrate. The friction coefficient is in the range of 0.4-0.8 for TiN coatings and 0.5 for CrN coatings. Coatings deposited at a potential of -50 V show optimal tribological properties.

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