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Title: He Bubble Concentration, Size and Strain in Implanted Aluminum by SAXS/WAXS

Abstract

Alpha-radiation damage in metals is a concern for long-term radioactive storage and systems that produce nuclear energy. Accurate prediction of irradiated material properties and failure mechanisms depends on a fundamental understanding of the size and relative percentage of helium (He) bubbles. X-ray scattering experiments are a valuable tool to resolve the nanobubble morphology (of ~ 1011 bubbles) and crystallographic strain as a function of He implantation energy and concentration in aluminum (Al) foils. A proportional change in bubble volume fraction is observed with He concentration within the same sample, while only a slight increase in the mean bubble size is observed. Estimates of the He fraction in the bubble phase with sizes ~ 4 nm, along with the overall crystallographic strain, suggest a proportion of the total implanted He exists as small bubbles (~ 1 nm) and possibly as defects in the crystal lattice. Furthermore, the fraction of He in 4-nm nanobubbles increases significantly when the He energy is above the Coulomb barrier of Al.

Authors:
ORCiD logo [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
OSTI Identifier:
1647143
Report Number(s):
LLNL-JRNL-776303
Journal ID: ISSN 1047-4838; 968158
Grant/Contract Number:  
AC52-07NA27344; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 72; Journal Issue: 1; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Alpha-radiation; He implantation; solid-state bubbles; radiation damage; X-ray scattering

Citation Formats

Hammons, Joshua A., Tumey, Scott J., Idell, Yaakov, and Jeffries, Jason R. He Bubble Concentration, Size and Strain in Implanted Aluminum by SAXS/WAXS. United States: N. p., 2019. Web. https://doi.org/10.1007/s11837-019-03763-7.
Hammons, Joshua A., Tumey, Scott J., Idell, Yaakov, & Jeffries, Jason R. He Bubble Concentration, Size and Strain in Implanted Aluminum by SAXS/WAXS. United States. https://doi.org/10.1007/s11837-019-03763-7
Hammons, Joshua A., Tumey, Scott J., Idell, Yaakov, and Jeffries, Jason R. Wed . "He Bubble Concentration, Size and Strain in Implanted Aluminum by SAXS/WAXS". United States. https://doi.org/10.1007/s11837-019-03763-7. https://www.osti.gov/servlets/purl/1647143.
@article{osti_1647143,
title = {He Bubble Concentration, Size and Strain in Implanted Aluminum by SAXS/WAXS},
author = {Hammons, Joshua A. and Tumey, Scott J. and Idell, Yaakov and Jeffries, Jason R.},
abstractNote = {Alpha-radiation damage in metals is a concern for long-term radioactive storage and systems that produce nuclear energy. Accurate prediction of irradiated material properties and failure mechanisms depends on a fundamental understanding of the size and relative percentage of helium (He) bubbles. X-ray scattering experiments are a valuable tool to resolve the nanobubble morphology (of ~ 1011 bubbles) and crystallographic strain as a function of He implantation energy and concentration in aluminum (Al) foils. A proportional change in bubble volume fraction is observed with He concentration within the same sample, while only a slight increase in the mean bubble size is observed. Estimates of the He fraction in the bubble phase with sizes ~ 4 nm, along with the overall crystallographic strain, suggest a proportion of the total implanted He exists as small bubbles (~ 1 nm) and possibly as defects in the crystal lattice. Furthermore, the fraction of He in 4-nm nanobubbles increases significantly when the He energy is above the Coulomb barrier of Al.},
doi = {10.1007/s11837-019-03763-7},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 1,
volume = 72,
place = {United States},
year = {2019},
month = {9}
}

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