Research Article
Tribology of Coated 316L SS by Various Nanoparticles
Table 2
Comparison of surface microhardness between 316L SS substrates and various coating materials at different sputtering times using one-way ANOVA.
| Variables | 1st reading | 2nd reading | 3rd reading | 4th reading | Mean GPa | SD ± | ANOVA |
| Nb-1 hr | 2.26 | 2.03 | 2.06 | 2.15 | 2.12 | 0.105 | F = 14.783
| Nb-2 hrs | 2.23 | 2.45 | 2.54 | 2.46 | 2.42 | 0.134 | Nb-3 hrs | 2.18 | 2.65 | 2.46 | 2.53 | 2.46 | 0.200 | SS | 1.90 | 2.00 | 1.89 | 1.85 | 1.91 | 0.064 |
| Ta-1 hr | 2.42 | 2.66 | 2.82 | 2.91 | 2.70 | 0.217 | F = 29.580
| Ta-2 hrs | 2.57 | 3.03 | 2.81 | 2.82 | 2.81 | 0.190 | Ta-3 hrs | 3.08 | 3.13 | 2.73 | 2.90 | 2.96 | 0.181 | SS | 1.90 | 2.00 | 1.89 | 1.85 | 1.91 | 0.064 |
| V-1 hr | 2.21 | 2.02 | 1.96 | 2.03 | 2.05 | 0.109 | F = 37.977
| V-2 hrs | 2.24 | 2.30 | 2.34 | 2.38 | 2.32 | 0.061 | V-3 hrs | 2.33 | 2.44 | 2.47 | 2.44 | 2.42 | 0.062 | SS | 1.90 | 2.00 | 1.89 | 1.85 | 1.91 | 0.064 |
| Nb | 2.22 | 2.38 | 2.35 | 2.38 | 2.33 | 0.075 | F = 103.499
| Ta | 2.69 | 2.94 | 2.79 | 2.88 | 2.82 | 0.110 | V | 2.26 | 2.25 | 2.26 | 2.28 | 2.26 | 0.014 | SS | 1.90 | 2.00 | 1.89 | 1.85 | 1.91 | 0.064 |
|
|
The mean difference is significant at the 0.05 level. |