Tribology of Coated 316L SS by Various Nanoparticles

Table 3

Comparison of surface microhardness between 316L SS and various coating materials (Ta, Nb, and V) at different sputtering times using Tukey’s post hoc tests.

Dependent variables	Independent variables		Mean difference	Sig.
Nb	SS	Nb-1 hr	−0.210	0.162
		Nb-2 hrs	−0.510
		Nb-3 hrs	−0.546
Ta	SS	Ta-1 hr	−0.793
		Ta-2 hrs	−0.898
		Ta-3 hrs	−1.050
V	SS	V-1 hr	−0.145	0.079
		V-2 hrs	−0.405
		V-3 hrs	−0.510
Coatings	SS	Nb	−0.423
		Ta	−0.916
		V	−0.353

The mean difference is significant at the 0.05 level.