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Segregation and Ordering at Alloy Surfaces Studied by Low-Energy Ion Scattering

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Chemistry and Physics of Solid Surfaces IV

Part of the book series: Springer Series in Chemical Physics ((CHEMICAL,volume 20))

Abstract

Surface segregation in metal alloys, the equilibrium enrichment of the free surface by one of the components, has only recently been recognized as a very general phenomenon having important implications for catalysis, corrosion, microelectronics, and also grain-boundary segregation (Chap.19, [18.1]) with its influence on the strength of alloys. The term surface segregation, as it is usually employed and as it is used in this paper, refers to an equilibrium condition which is normally achieved at an elevated temperature to allow sufficient mobility of the atoms and in UHV to avoid interfering chemical reactions. Unwanted impurities in the bulk, e.g., S in Ni alloys, may also segregate to the surface and shift the equilibrium of interest. However, such impurities can usually be removed by ion bombardment at high temperature, above the range of the experimental measurements, leaving a depleted region deep enough so that impurity atoms cannot reach the surface during the measurements.

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Authors
  1. T. M. Buck
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Editors and Affiliations

  1. Department of Chemistry and Laboratory for Surface Studies, The University of Wisconsin-Milwaukee, 53201, Milwaukee, WI, USA

    Ralf Vanselow  & Russel Howe  & 

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Buck, T.M. (1982). Segregation and Ordering at Alloy Surfaces Studied by Low-Energy Ion Scattering. In: Vanselow, R., Howe, R. (eds) Chemistry and Physics of Solid Surfaces IV. Springer Series in Chemical Physics, vol 20. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-47495-8_18

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  • DOI: https://doi.org/10.1007/978-3-642-47495-8_18

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