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

Multi-element solid solution alloys are intrinsically disordered on the atomic scale, and many of their advanced properties originate from the unique local structural characteristics. We measured the local structure of a NiCoCr solid solution alloy with X-ray/neutron total scattering and extended X-ray absorption fine structure (EXAFS) techniques. The atomic pair distribution function analysis (PDF) did not exhibit distinct structural distortion. But, EXAFS analysis suggested that the Cr atoms are favorably bonded with Ni and Co in the solid solution alloys. This short-range order (SRO) plays a role in the distinct low values of electrical and thermal conductivities in Ni-based solid solution alloys when Cr is incorporated. Both the long-range and local structures of the NiCoCr alloy upon Ni ion irradiation were studied and an irradiation-induced enhancement of SRO was found.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5] ;  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Divsion of Materials Science Division
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  3. Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Divsion of Materials Science Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 20; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1360070
Alternate Identifier(s):
OSTI ID: 1358531

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., and Zhang, Yanwen. Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy. United States: N. p., Web. doi:10.1103/PhysRevLett.118.205501.
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. Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy. United States. doi:10.1103/PhysRevLett.118.205501.
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., and Zhang, Yanwen. 2017. "Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy". United States. doi:10.1103/PhysRevLett.118.205501. https://www.osti.gov/servlets/purl/1360070.
@article{osti_1360070,
title = {Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy},
author = {Zhang, F. X. and Zhao, Shijun and Jin, Ke and Xue, H. and Velisa, G. and Bei, H. and Huang, R. and Ko, J. Y. P. and Pagan, D. C. and Neuefeind, J. C. and Weber, W. J. and Zhang, Yanwen},
abstractNote = {Multi-element solid solution alloys are intrinsically disordered on the atomic scale, and many of their advanced properties originate from the unique local structural characteristics. We measured the local structure of a NiCoCr solid solution alloy with X-ray/neutron total scattering and extended X-ray absorption fine structure (EXAFS) techniques. The atomic pair distribution function analysis (PDF) did not exhibit distinct structural distortion. But, EXAFS analysis suggested that the Cr atoms are favorably bonded with Ni and Co in the solid solution alloys. This short-range order (SRO) plays a role in the distinct low values of electrical and thermal conductivities in Ni-based solid solution alloys when Cr is incorporated. Both the long-range and local structures of the NiCoCr alloy upon Ni ion irradiation were studied and an irradiation-induced enhancement of SRO was found.},
doi = {10.1103/PhysRevLett.118.205501},
journal = {Physical Review Letters},
number = 20,
volume = 118,
place = {United States},
year = {2017},
month = {5}
}