Static displacements of atoms in crystalline metallic solid solutions
- Oak Ridge National Lab., TN (United States)
- Sandia National Labs., Livermore, CA (United States)
- Oak Ridge Inst. of Science and Education, TN (United States)
Measurement of diffuse x-ray scattering from binary crystalline solid solutions at more than one x-ray energy is a sensitive probe of the average interatomic distance between neighboring pairs of atoms. Deviations of these bond distances by as little as 0.001 {angstrom} are easily detected in the diffuse scattering from binary alloys consisting of atoms nearby in the periodic table and/or where x-ray energies chosen near their absorption edges can change the scattering contrast. Individual bond distances (AA, AB and BB) are recovered out to several near neighbor shells by combining three scattering measurements at x-ray energies chosen for maximum and minimum contrast. Average bond distances recovered from four metal alloys Fe{sub 77.5}Ni{sub 22.5}, Fe{sub 46.5}Ni{sub 53.5}, Cr{sub 47}Fe{sub 53} and Cr{sub 20}Ni{sub 80} are discussed. The authors find that the interatomic distances measured for these alloys give interesting insights to atomic displacements in solid solutions. Nearest neighbor bond distances are not well represented by phenomenological models based on pure element atomic size and concentration dependence of the lattice constants. Radial and nonradial displacements are recovered from these measurements of diffuse scattering.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 73009
- Report Number(s):
- CONF-941144-158; ON: DE95012893; TRN: AHC29519%%137
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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