Table 4.

The initial and final friction coefficients and the initial roughness of the coating on titanium substrate obtained from solution A for different periods of deposition. Measurement conditions: diameter of the test ball 2 mm; load 20 g and Hertzian pressure of P = 600 MPa.

Tested Film	Initial Coefficient of Friction	Final Coefficient of Friction (after 100 Cycles)	Initial Roughness (μm)
Pure HA film obtained from solution A without NP after 3 h deposition	0.66 ± 0.08	0.78 ± 0.04	1.59 ± 0.28
HA film with Re:IF-MoS2 NP obtained from solution A after 2 h	0.75 ± 0.05	0.63 ± 0.03	0.49 ± 0.05
HA film with Re:IF-MoS2 NP obtained from solution A after 3 h	0.53 ± 0.03	0.55 ± 0.04	0.57 ± 0.17
HA film with Re:IF-MoS2 NP obtained from solution A after 4 h	0.13 ± 0.01	0.12 ± 0.02	0.48 ± 0.02