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Dual mode segregation of Pd to the surface of polycrystalline Fe99Pd1 |
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| Authors: | C. Creemers |
| Affiliation: | Fysico-chemisch Laboratorium, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001, Leuven, Belgium |
| Abstract: | On a polycrystalline Fe99Pd1 sample, unusually fast and abundant segregation is observed up to 55 at% Pd. The dependence on temperature and on the bulk concentration are also contradictory to normal segregation behaviour. Once the sample is heated to at least 750–800°C, normal, slower segregation behaviour is observed up to a maximum of ca. 35 at% Pd. The unusual segregation behaviour can be explained by segregation from a two-phase bulk leading to an ordered Fe50Pd50 surface phase. |
| Keywords: | Intermetallic compounds Iron LEIS Palladium Polycrystalline surfaces Surface segregation Surface thermodynamics |
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