Research Article
Optimization of Electroless Ni-P-W Coatings for Minimum Friction and Wear Using Grey-Taguchi Method
Table 8
Results of ANOVA for grey relational grade.
| Source | Degree of freedom | Sum of square | Mean of square | -ratio | % contribution |
| Load | 2 | 0.105025 | 0.052513 | 14.67* | 18.51 | Speed | 2 | 0.077586 | 0.038793 | 10.84* | 13.67 | Time | 2 | 0.147818 | 0.073909 | 20.65* | 26.05 | Load * speed | 4 | 0.194203 | 0.048551 | 13.57* | 34.23 | Load * time | 4 | 0.007265 | 0.001816 | 0.51 | 1.28 | Speed * time | 4 | 0.006837 | 0.001709 | 0.48 | 1.21 | Error | 8 | 0.028627 | 0.003578 | | 5.05 |
| Total | 26 | 0.567361 | | | 100 |
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Significant at 99% confidence level.
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