Abstract
In this paper, the relation between the friction coefficient and the specific ware ratio of stainless steel, ceramics, polymer and diamond like carbon (DLC) coated steel slid with stainless steel under line contact condition was described. The sliding tests were carried out using block on ring type friction and ware testing machine. The results of the relation between friction coefficient and specific ware ratio show the typical region of each material. The DLC coating shows the lowest friction and lowest ware. The polymer materials also show low friction and medium ware especially in ultra high molecular weight polyethylene and polyetheretherketone composite material. According to the ceramics materials, the silicon carbide (SiC) shows the high friction and ware different from the case of SiC-SiC contact.