Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy

F. X. Zhang, Shijun Zhao, Ke Jin, H. Xue, G. Velisa, H. Bei, R. Huang, J. Y.P. Ko, D. C. Pagan, J. C. Neuefeind, W. J. Weber, Yanwen Zhang

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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.

Original languageEnglish (US)
Article number205501
JournalPhysical review letters
Volume118
Issue number20
DOIs
StatePublished - May 19 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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