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artículo con referato
"Surface structure and composition of Ni-Ti alloys and their influence on the temperature-dependent segregation behavior"
G. Bozzolo, H.O. Mosca and M.F. del Grosso
Appl. Surf. Sci. 255(5), Part 2 (2008) 3004-3010
Atomistic modeling of segregation in Ni-Ti alloys is performed using the Bozzolo-Ferrante-Smith (BFS) method for alloys. It is found that Ti segregation to the surface decreases rapidly even for small increases in Ni concentration. A competing process is identified in the vicinity of surface defects, leading to excess Ti coverage of the exposed surface and the creation of Ti-covered pits. A simple explanation based on an atom-by-atom energy analysis is found to satisfactorily explain the observed effects.
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