Formation of Nanostractured Coat on Al Plate by Surface Mechanical Coating (SMC) for Intelligent Food Packaging

Because of coating metals for use in various applications including the food industry is of particular importance, therefore, in this paper new method for coating aluminum sheet for use in food packaging industry are presented and examined. Reviewing formation of solid solution through providing powder from the surface of ball and also feasibility of surface mechanical coating (SMC) by using mechanical alloying method and effect of the two parameters, milling time duration and ball diameter on these two matters are items that are being reviewed in this article. In this respect, mechanical alloying process in the presence of copper powder and nickel ball has been used. Parameters which are being reviewed are: 1- milling time (5, 10, 20, 60 and 120 hours) and 2- ball diameter (5 and 9 mm). Various analyses including analysis of X-ray diffraction (XRD), scanning electron microscope (SEM) and electron probe micro-analyzer (EPMA) have been used in order to obtain the desired results. The reviews indicate that providing powder from surface of ball increases with the increase of milling time and ball diameter. It was also specified that formation of coating on the surface of ball is possible at the time of mechanical alloying process.