XPS investigations of tribolayers formed on TiN and (Ti,Re)N coatings

- The (Ti,Re)N coating (8 ± 1.9 at.% Re) consisted of TiN and ReNx (x > 1.33) phases.
- TiO2 provided low friction coefficient to TiN coating at 150 °C.
- Re addition to TiN drastically dropped the friction coefficients to 0.17-0.22.
- Re2O7 provided very low friction coefficient to (Ti,Re)N coating.
- Re addition to TiN improved the wear behavior.