Surface segregation: A comparison of models and results
It is well established that the surface composition of a metal alloy may differ markedly from that of the bulk. Theoretical treatments of this phenomenon have been mostly based on models for regular or related solutions. Experimentalists have reported a large body of surface composition data, mostly from the electron spectroscopies. Comparison of these results with the predictions of the models is appropriate to indicate potentially fruitful directions for future work. Though general agreement between theory and experiment is good, quantitative correlation has been hampered by inadequate model calculations, clouded experimentation, and difficult-to-interpret experimental results. Extension of the quasichemical model and inclusion of strain effects improves correlations with previously reported data. Comparing the results of such improved calculations with the sampling capability of surface elemental analysis techniques shows that the relationship between the two is not simple and can be fully elucidated only in some instances. © 1979.
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- Physical Chemistry
- 4004 Chemical engineering
- 3406 Physical chemistry
- 3402 Inorganic chemistry
- 0904 Chemical Engineering
- 0306 Physical Chemistry (incl. Structural)
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Physical Chemistry
- 4004 Chemical engineering
- 3406 Physical chemistry
- 3402 Inorganic chemistry
- 0904 Chemical Engineering
- 0306 Physical Chemistry (incl. Structural)