Tribological exams ended up performed using a ball-on-disc T-11 tester. The balls have been product of metal, While the discs have been fabricated from steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description with the product as well as procedures has actually been supplied in the literature (Szczerek https://matthewc837aip0.illawiki.com/user