sliding at 25N load shows a similar performance to those seen when tribologically tested at 5N. Hardness on the 100 revs wear scar is approx. 2.31 GPa, steadily increasing with continued sliding time to ~3.80 GPa after 12,800 revs. A significant drop of H to 1.54 GPa was seen after 20,000 revs, consistent with the perceived failure of the coatings' lubrication performance during PoD sliding. The elastic moduli of the coating at 25N load remain consistently high (between 96 and 120 GPa) between 100 and 12,800 revs, only dropping to 37 GPa after 20,000 revs.