Analysis of the Performance Characteristics of ZnO Nanoparticles’ Dispersed Polyester Oil

Table 3

Coefficient of friction values of NPDP with different wt. % of ZnO ball-milled nanoparticles at various loads for 1 hour duration.

Load (kg)/force (N)	CoF (grade 60 oil)	CoF (0.1 wt. %)	CoF (0.3 wt. %)	CoF (0.5 wt. %)
4.0/39 N	0.102	0.055	0.023	0.094
5.0/49N	0.133	0.074	0.035	0.083
6.0/58N	0.132	0.099	0.090	0.097