Improvement in Tribological Performance of Ni-P-TiO₂ Composite Coatings Using Taguchi Technique with Grey Relational Analysis

Table 3

Experimental values of friction coefficient and wear depth.

Sr. number	Friction coefficient	Wear depth (µm)
1	0.147	1.34
2	0.1672	3.53
3	0.186	5.25
4	0.1626	4.89
5	0.1786	7.87
6	0.2394	9.53
7	0.2494	6.37
8	0.2664	10.34
9	0.3556	13.1
10	0.134	2.53
11	0.1589	4.03
12	0.1936	6.43
13	0.1377	4.25
14	0.1618	9.92
15	0.2148	12.28
16	0.172	10.64
17	0.256	13.42
18	0.3272	16.35
19	0.2472	14.88
20	0.26	17.72
21	0.298	20.64
22	0.1349	15.56
23	0.1812	21.83
24	0.2342	24.71
25	0.1534	12.57
26	0.2686	17.54
27	0.291	23.63