Journal of Phase Equilibria

, 19:529 | Cite as

Diffuse scattering measurements of static atomic displacements in crystalline binary solid solutions

  • G. E. Ice
  • C. J. Sparks
  • X. Jiang
  • L. Robertson
Section I: Basic and Applied Research
Received:
Revised:

Abstract

Diffuse x-ray scattering from crystalline solid solutions is sensitive to both local chemical order and local bond distances. In short-range ordered alloys, fluctuations of chemistry and bond distances break the long-range symmetry of the crystal within a local region and contribute to the total energy of the alloy. Recent use of tunable synchrotron radiation to change the x-ray scattering contrast between elements has greatly advanced the measurement of bond distances between the three kinds of atom pairs found in crystalline binary alloys. The estimated standard deviation on these recovered static displacements approaches ± 0.001 å (± 0.0001 nm), which is an order of magnitude more precise than obtained with extended x-ray absorption fine structure measurement. In addition, both the radial and tangential displacements can be recovered to five near neighbors and beyond. These static displacement measurements provide new information that challenges the most advanced theoretical models of binary crystalline alloys.

Keywords

Average Lattice Static Displacement Atom Pair Atomic Size Difference Crystalline Solid Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© ASM International 1998

Authors and Affiliations

  • G. E. Ice
    • 1
  • C. J. Sparks
    • 1
  • X. Jiang
    • 1
  • L. Robertson
    • 1
  1. 1.Oak Ridge National LaboratoryOak Ridge

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