Optimization of Electroless Ni-P-W Coatings for Minimum Friction and Wear Using Grey-Taguchi Method

Table 5

Grey relational analysis for friction coefficient and wear depth.

Exp. no.	Normalized Data		ΔValues		Grey relational coefficient
	Cof	Wear	Cof	Wear	Cof	Wear
1	0.521	1.000	0.479	0.000	0.510	1.000
2	0.616	0.954	0.384	0.046	0.566	0.915
3	0.499	0.905	0.501	0.095	0.500	0.840
4	1.000	0.948	0.000	0.052	1.000	0.906
5	0.739	0.905	0.261	0.095	0.657	0.841
6	0.741	0.850	0.259	0.150	0.658	0.770
7	0.233	0.575	0.767	0.425	0.395	0.541
8	0.089	0.435	0.911	0.565	0.354	0.469
9	0.042	0.148	0.958	0.852	0.343	0.370
10	0.244	0.783	0.756	0.217	0.398	0.698
11	0.038	0.703	0.962	0.297	0.342	0.628
12	0.162	0.547	0.838	0.453	0.374	0.525
13	0.507	0.964	0.493	0.036	0.504	0.933
14	0.297	0.740	0.703	0.260	0.416	0.658
15	0.000	0.508	1.000	0.492	0.333	0.504
16	0.937	0.539	0.063	0.461	0.888	0.520
17	0.639	0.377	0.361	0.623	0.581	0.445
18	0.752	0.257	0.248	0.743	0.668	0.402
19	0.946	0.263	0.054	0.737	0.903	0.404
20	0.576	0.030	0.424	0.970	0.541	0.340
21	0.365	0.000	0.635	1.000	0.441	0.333
22	0.531	0.708	0.469	0.292	0.516	0.632
23	0.278	0.548	0.722	0.452	0.409	0.525
24	0.513	0.448	0.487	0.552	0.507	0.475
25	0.852	0.433	0.148	0.567	0.772	0.469
26	0.220	0.235	0.780	0.765	0.391	0.395
27	0.595	0.002	0.405	0.998	0.553	0.334