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

doi:10.1103/PhysRevLett.118.205501

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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351 Scopus citations

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 language	English
Article number	205501
Journal	Physical Review Letters
Volume	118
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.118.205501
State	Published - May 19 2017
Externally published	Yes

Funding

This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy of Sciences. Neutron diffraction measurements used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The x-ray PDF and EXAFS measurements were conducted at the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF Grant No.DMR-1332208.

Funders	Funder number
DOE Office of Science
National Institutes of Health/National Institute of General Medical Sciences
National Science Foundation
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory

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10.1103/PhysRevLett.118.205501

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title = "Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy",

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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AU - Zhang, F. X.

AU - Zhao, Shijun

AU - Jin, Ke

AU - Xue, H.

AU - Velisa, G.

AU - Bei, H.

AU - Huang, R.

AU - Ko, J. Y.P.

AU - Pagan, D. C.

AU - Neuefeind, J. C.

AU - Weber, W. J.

AU - Zhang, Yanwen

PY - 2017/5/19

Y1 - 2017/5/19

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

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