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

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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 {angstrom} (0.0001 nm) which is an order ... continued below

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18 p.

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Ice, G.E.; Sparks, C.J.; Jiang, X. & Robertson, L. September 1, 1997.

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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 {angstrom} (0.0001 nm) which is an order of magnitude more precise than obtained with EXAFS. In addition, both the radial and tangential displacements can be recovered to five near neighbors and beyond. These static displacement measurements provide new information which challenges the most advanced theoretical models of binary crystalline alloys. 29 refs., 8 figs., 2 tabs.

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18 p.

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OSTI as DE97008468

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  • Materials Week `97, Indianapolis, IN (United States), 14-18 Sep 1997

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  • Other: DE97008468
  • Report No.: CONF-970980--1
  • Grant Number: AC04-94AL85000;AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 522720
  • Archival Resource Key: ark:/67531/metadc691205

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 8, 2016, 7:09 p.m.

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Ice, G.E.; Sparks, C.J.; Jiang, X. & Robertson, L. Diffuse scattering measurements of static atomic displacements in crystalline binary solid solutions, article, September 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc691205/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.