Abstract:The surface layer of Ni₆₈P₁₈Cr₁₄ amorphous alloy was studied by AES and XPS associated with ion beam sputtering. It was found that great differences existed between the surface layer and the bulk both in composition and chemical states. The dominant component elements Ni and P were of lower content in the surface laver, while Cr was enriched. Cr was drastically oxidized in the surface layer, but Ni underwent no oxidation. There was a P enriched region just helow the surface oxide layer, which was supposed to enhance the surface segregation of Cr. Ni underwent no oxidation in Ni₆₈P₁₈Cr₁₄ amorphous alloy.

Key words: surface layer oxidation amorphous alloy Ni₆₈P₁₈Cr₁₄