Surface Segregation in Multicomponent Systems

Released on by National Aeronautics and Space Adm Nasa
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  • Surface Segregation in Multicomponent Systems Book Detail

  • Author : National Aeronautics and Space Adm Nasa
  • Release Date : 2018-09-21
  • Publisher : Independently Published
  • Genre :
  • Pages : 54
  • ISBN 13 : 9781723891441
  • File Size : 63,63 MB
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Surface Segregation in Multicomponent Systems by National Aeronautics and Space Adm Nasa PDF Summary

Book Description: The study of surface segregation, although of great technological importance, has been largely restricted to experimental work due to limitations associated with theoretical methods. However, recent improvements in both first-particle and semi-empirical methods are opening, the doors to an array of new possibilities for surface scientists. We apply one of these techniques, the Bozzolo, Ferrante and Smith (BFS) method for alloys, which is particularly suitable for complex systems, to several aspects of the computational modeling of surfaces and segregation, including alloy surface segregation, structure and composition of alloy surfaces, and the formation of surface alloys. We conclude with the study of complex NiAl-based binary, ternary and quaternary thin films (with Ti, Cr and Cu additions to NiAl). Differences and similarities between bulk and surface compositions are discussed, illustrated by the results of Monte Carlo simulations. For some binary and ternary cases, the theoretical predictions are compared to experimental results, highlighting the accuracy and value of this developing theoretical tool.Bozzolo, Guillermo and Ferrante, John and Noebe, Ronald D. and Good, Brian and Honecy, Frank S. and Abel, PhillipGlenn Research CenterMETAL SURFACES; THIN FILMS; SURFACE STABILITY; ALLOYS; SEPARATION; MONTE CARLO METHOD; NICKEL ALUMINIDES

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