Surface segregation in Au0.1Cu0.9 crystals
作者： M.J. Sparnaay , G.E. Thomas
DOI: 10.1016/0039-6028(83)90218-2
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摘要: Abstract A study was made of the surface segregation (111), (110) and (100) surfaces single crystals (fcc) alloy Au x Cu 1− , where = 0.1 (and 0.9). Also polycrystalline samples were used. The experimental technique applied that LEIS. results are in all cases there is a gold enrichment accompanied by depletion layer beneath surface. There only weak plane specificity. kinetics process diffusion determined believed to be responsible for occurrence depleted region. simple thermodynamic analysis B difference γ α −γ (γ A,B tensions, atomic areas) as factor determining segregation. For alloys this 8% separate γα values. Since current value sign points copper enrichment, role possible correction discussed.
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