Entropy-driven surface segregation of Pt in PtRh alloys
- 1 July 1987
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology A
- Vol. 5 (4) , 558-561
- https://doi.org/10.1116/1.574672
Abstract
Pt segregation to the surface of PtRh alloys, as reported by several authors, cannot be explained by segregation models based on the enthalpy of segregation alone. However, a model, which includes the influence of lattice vibrational entropy, predicts the surface composition of PtRh alloys correctly over the complete concentration range.Keywords
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