Observations of the Effects of Temperature and Crystallographic Orientation on Surface Segregation in an Fe-Si-Sn-C Alloy.

Abstract

Auger electron spectroscopy was used to study segregation of Group IVB solutes to the surfaces of individual grains of a polycrystalline Fe-3.1 pct Si-0.06 pct Sn-0.004 pct C alloy heated in UHV. As the temperature was increased C, Si, and finally Sn segregate in that order, consistent with their diffusivities in Fe, each succeeding element expelling the preceding from the surface. The interactions between C and Si and between Si and Sn appear to be strongly repulsive, while the interaction between C and Sn appears weak; this is discussed in terms of a size effect. The segregation behavior of each element depends on the crystallographic orientation of the surface; C and Sn seem to follow similar patterns, while Si behaves somewhat differently. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 17, 1980
Accession Number
ADA092169

Entities

People

  • C. J. Mcmahon Jr.
  • Shin-cheng Fu
  • Xong-xin Zhou

Organizations

  • University of Pennsylvania

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Air
  • Alloys
  • Atoms
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Chemical Compounds
  • Chemistry
  • Classification
  • Crystal Structure
  • Electron Spectroscopy
  • Electrons
  • Military Research
  • Observation
  • Orientation (Direction)
  • Spectroscopy
  • Sputtering

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene