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Title: Role of electronic energy loss on defect production and interface stability: Comparison between ceramic materials and high-entropy alloys

Abstract

High-entropy alloys (HEAs) and some complex alloys exhibit desirable properties and significant structural stability in harsh environments, including possible applications in advanced reactors. Energetic ion irradiation is often used as a surrogate for neutron irradiation; however, the impact of ion electronic energy deposition and dissipation is often neglected. Moreover, differences in recoil energy spectrum and density of cascade events on damage evolution must also be considered. In many chemically complex alloys, the mean free path of electrons is reduced significantly, thus their decreased thermal conductivity and slow dissipation of localized radiation energy can have noticeable effects on displacement cascade evolution that is greatly different from metals with high thermal conductivity. In this work, nanocrystalline HEAs of Ni20Fe20Co20Cr20Cu20 and nonequiatomic (NiFeCoCr)97Cu3, both having much lower room-temperature thermal conductivity than pure Ni or Fe, are chosen as model HEAs to reveal the role that electronic energy loss during ion irradiation has in complex alloys. The response of nanocrystalline HEAs is investigated under irradiation at room temperature using MeV Ni and Au ions that have different ratios of electronic energy to damage energy, which is the energy dissipated in displacing atoms. Different from previously reported amorphization of nanocrystalline SiC, experimental results on thesemore » HEAs show that, similar to the process in nanocrystalline oxide materials, both inelastic thermal spikes via electron–phonon coupling and elastic thermal spikes via collisions among atomic nuclei contribute to the overall grain growth. The growth follows a power law dependence with the total deposited ion energy, and the derived value of the power-exponent suggests that the irradiation-induced instability at and near grain boundaries leads to local rapid atomic rearrangements and consequently grain growth. The high power-exponent value can be attributed to the sluggish diffusion and delayed defect evolution arising from the chemical complexity intrinsic to HEAs. Here, this work calls attention to quantified fundamental understanding of radiation damage processes beyond that of simplified displacement events, especially in simulating neutron environments.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [3];  [5];  [5]; ORCiD logo [6];  [7];  [8];  [8];  [9]
+ Show Author Affiliations
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of Huddersfield (United Kingdom); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  7. Univ. of Huddersfield (United Kingdom)
  8. Univ. of Michigan, Ann Arbor, MI (United States)
  9. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE Laboratory Directed Research and Development (LDRD) Program; Engineering and Physical Sciences Research Council (EPSRC); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1872838
Alternate Identifier(s):
OSTI ID: 1886126; OSTI ID: 1994131
Report Number(s):
LLNL-JRNL-814729; LA-UR-22-23704
Journal ID: ISSN 1359-0286
Grant/Contract Number:  
AC05-00OR22725; C0403040; ERKCZ01; 20200689PDR2; EP/E017266/1; EP/M028283/1; AC52-07NA27344; 89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Current Opinion in Solid State and Materials Science
Additional Journal Information:
Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1359-0286
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; Radiation damage; High-entropy alloys; Chemically complex alloys; nanocrystalline alloys; Crystallites; Electronic energy loss; Displacement damage; grain growth

Citation Formats

Zhang, Yanwen, Silva, Chinthaka, Lach, Timothy G., Tunes, Matheus Araujo, Zhou, Yufan, Nuckols, Lauren, Boldman, Walker L., Rack, Philip D., Donnelly, Stephen E., Jiang, Li, Wang, Lumin, and Weber, William J. Role of electronic energy loss on defect production and interface stability: Comparison between ceramic materials and high-entropy alloys. United States: N. p., 2022. Web. doi:10.1016/j.cossms.2022.101001.
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Zhang, Yanwen, Silva, Chinthaka, Lach, Timothy G., Tunes, Matheus Araujo, Zhou, Yufan, Nuckols, Lauren, Boldman, Walker L., Rack, Philip D., Donnelly, Stephen E., Jiang, Li, Wang, Lumin, & Weber, William J. Role of electronic energy loss on defect production and interface stability: Comparison between ceramic materials and high-entropy alloys. United States. https://doi.org/10.1016/j.cossms.2022.101001
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Zhang, Yanwen, Silva, Chinthaka, Lach, Timothy G., Tunes, Matheus Araujo, Zhou, Yufan, Nuckols, Lauren, Boldman, Walker L., Rack, Philip D., Donnelly, Stephen E., Jiang, Li, Wang, Lumin, and Weber, William J. Thu . "Role of electronic energy loss on defect production and interface stability: Comparison between ceramic materials and high-entropy alloys". United States. https://doi.org/10.1016/j.cossms.2022.101001. https://www.osti.gov/servlets/purl/1872838.
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@article{osti_1872838,
title = {Role of electronic energy loss on defect production and interface stability: Comparison between ceramic materials and high-entropy alloys},
author = {Zhang, Yanwen and Silva, Chinthaka and Lach, Timothy G. and Tunes, Matheus Araujo and Zhou, Yufan and Nuckols, Lauren and Boldman, Walker L. and Rack, Philip D. and Donnelly, Stephen E. and Jiang, Li and Wang, Lumin and Weber, William J.},
abstractNote = {High-entropy alloys (HEAs) and some complex alloys exhibit desirable properties and significant structural stability in harsh environments, including possible applications in advanced reactors. Energetic ion irradiation is often used as a surrogate for neutron irradiation; however, the impact of ion electronic energy deposition and dissipation is often neglected. Moreover, differences in recoil energy spectrum and density of cascade events on damage evolution must also be considered. In many chemically complex alloys, the mean free path of electrons is reduced significantly, thus their decreased thermal conductivity and slow dissipation of localized radiation energy can have noticeable effects on displacement cascade evolution that is greatly different from metals with high thermal conductivity. In this work, nanocrystalline HEAs of Ni20Fe20Co20Cr20Cu20 and nonequiatomic (NiFeCoCr)97Cu3, both having much lower room-temperature thermal conductivity than pure Ni or Fe, are chosen as model HEAs to reveal the role that electronic energy loss during ion irradiation has in complex alloys. The response of nanocrystalline HEAs is investigated under irradiation at room temperature using MeV Ni and Au ions that have different ratios of electronic energy to damage energy, which is the energy dissipated in displacing atoms. Different from previously reported amorphization of nanocrystalline SiC, experimental results on these HEAs show that, similar to the process in nanocrystalline oxide materials, both inelastic thermal spikes via electron–phonon coupling and elastic thermal spikes via collisions among atomic nuclei contribute to the overall grain growth. The growth follows a power law dependence with the total deposited ion energy, and the derived value of the power-exponent suggests that the irradiation-induced instability at and near grain boundaries leads to local rapid atomic rearrangements and consequently grain growth. The high power-exponent value can be attributed to the sluggish diffusion and delayed defect evolution arising from the chemical complexity intrinsic to HEAs. Here, this work calls attention to quantified fundamental understanding of radiation damage processes beyond that of simplified displacement events, especially in simulating neutron environments.},
doi = {10.1016/j.cossms.2022.101001},
journal = {Current Opinion in Solid State and Materials Science},
number = 4,
volume = 26,
place = {United States},
year = {Thu Apr 14 00:00:00 EDT 2022},
month = {Thu Apr 14 00:00:00 EDT 2022}
}
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