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Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy.
Zhang, F X; Zhao, Shijun; Jin, Ke; Xue, H; Velisa, G; Bei, H; Huang, R; Ko, J Y P; Pagan, D C; Neuefeind, J C; Weber, W J; Zhang, Yanwen.
Affiliation
  • Zhang FX; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Zhao S; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Jin K; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Xue H; Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA.
  • Velisa G; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Bei H; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Huang R; Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14850, USA.
  • Ko JYP; Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14850, USA.
  • Pagan DC; Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14850, USA.
  • Neuefeind JC; Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Weber WJ; Division of Materials Science and Technology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Zhang Y; Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA.
Phys Rev Lett ; 118(20): 205501, 2017 May 19.
Article in En | MEDLINE | ID: mdl-28581808
ABSTRACT
Multielement solid solution alloys are intrinsically disordered on the atomic scale, and many of their advanced properties originate from the local structural characteristics. The local structure of a NiCoCr solid solution alloy is measured with x-ray or neutron total scattering and extended x-ray absorption fine structure (EXAFS) techniques. The atomic pair distribution function analysis does not exhibit an observable structural distortion. However, an EXAFS analysis suggests that the Cr atoms are favorably bonded with Ni and Co in the solid solution alloys. This short-range order (SRO) may make an important contribution to the low values of the electrical and thermal conductivities of the Cr-alloyed solid solutions. In addition, an EXAFS analysis of Ni ion irradiated samples reveals that the degree of SRO in NiCoCr alloys is enhanced after irradiation.
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Full text: 1 Database: MEDLINE Language: En Year: 2017 Type: Article
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Full text: 1 Database: MEDLINE Language: En Year: 2017 Type: Article