Abstract
In recent years, in the field of transportation equipment, the use of aluminum alloy having excellent lightweight, corrosion resistance and workability has increased from reducing the environmental impact. However, Al alloy has poor wear resistance, it is necessary to improve wear resistance. Various surface engineering techniques have been used in attempts to alleviate the abovementioned problems. Especially DLC coatings has properties high hardness, have low friction coefficient and good wear resistance. However, if DLC coating deposited onto Al alloy, poor adhesion due to large difference in hardness between the two materials becomes the problem. Therefore, using an intermediate AlN layer and AlCrN layer with a graded hardness for improvement of adhesion between Al alloy and DLC coating. And, deposition is aimed to simplify the deposition process by using only the unbalanced magnetron sputtering method (UBMS). In this study, we report that DLC coatings could improve the friction wear characteristics of Al alloy.
