Surface Segregation of Several Elements in High Purity Aluminum Foils

摘要

Surface segregation phenomena of several elements (Pb, Fe, Mn, Co and Cu) in high-purity aluminum foils were studied by Rutherford back scattering spectroscopy and transmission electron microscopy on heat-treated foils. The degree of surface segregation (content segregated at the surface/bulk content) was also different depending on the elements, I.e., the greatest degree for Pb (140-fold) and the least for Cu (almost nil), and the other elements were in the decreasing orders of Fe (80-fold), Co (13-fold) and Mn (9-fold). This change in the degree of surface segregation of the various elements followed a roughly similar tendency as the order of maximum solubility in aluminum.