Comparison of fretting wear properties of silver plating coating prepared by magnetron sputtering and electroplating processes
Silver coatings were prepared on the surface of steel substrates using electroplating and intermediate frequency direct-current magnetron sputtering processes.The hardness,adhesion and fretting wear properties of the two silver plated samples were characterized by microhardness tester,micrometer scratch tester and fatigue testing machine.The wear morphology and wear mechanism of the samples after fretting wear were analyzed by scanning electron microscopy and laser confocal microscopy.The results show that the microhardness and surface roughness of the silver plated samples prepared by magnetron sputtering process are better than those prepared by electroplating process.The adhesion of the silver plated samples prepared by magnetron sputtering process is 1.5 times higher than that of the electroplating samples,which is beneficial for improving the wear resistance of the coating.After 300 h of effective fretting wear,it is found that the wear depth of the silver coating prepared by magnetron sputtering process decreases by 33.3％compared to the silver coating prepared by electroplating process,which is related to the good surface smoothness and smaller particle size of the silver coating prepared by magnetron sputtering process.The wear mechanism of the silver plated samples prepared by magnetron sputtering process is abrasive wear,while the silver plated samples prepared by electroplating process is adhesive wear.
NETL
NSTL
万方数据
维普
