Search

Aluminum alloy itself does not provide sufficient wear resistance for structural parts. Therefore, there is need to protect against the wear issue in practical applications. The objective of this study is to investigate different parameters wear characteristics of direct current (dc) magnetron sputtered titanium films on Al7075-T7351 using a wear test. Each parameter has three levels which include the direct current (DC) power, deposition time, and substrate surface roughness. The thickness of the coatings was measured using a focused ion beam scanning electron microscopy (FIB-SEM) from approximately 0.5 μ m to 4.4 μ m. The titanium thin film coatings were then evaluated using a PD102 wear tester under conditions of 60 rpm, 2N, 30 minutes. As a result, the coefficient of friction of the coating was reduced, and the wear resistance of the coating was improved as the applied power and deposition time increased. The hardness of titanium-coated specimens is increased significantly up to 272 HV, while the hardness of uncoated specimens was 160 HV. [ABSTRACT FROM AUTHOR]

Mechanical parts have a problem of wear when used in extreme environments. Aluminum, most used in the industrial field, is a representative material of light weight, but its wear resistance is not good. To resolve the wear problem of such materials, research and development of surface thin film deposition technology has been increasing. Wear resistance was investigated after the Ti thin film was deposited by sputtering, one of the main methods of this technique. The smaller the surface roughness value and the thicker the thin film, the better the wear resistance. However, when a thin film is deposited for a predetermined time or less, the bonding strength with the base metal is lowered and the wear resistance is confirmed as low. [ABSTRACT FROM AUTHOR]