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Title: Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation

Abstract

Nanocrystalline materials are radiation-tolerant materials’ candidates due to their high defect sink density. Here, nanocrystalline iron films were irradiated with 10 keV helium ions in situ in a transmission electron microscope at elevated temperatures. Grain-size-dependent bubble density changes and denuded zone occurrence were observed at 700 K, but not at 573 K. This transition, attributed to increased helium–vacancy migration at elevated temperatures, suggests that nanocrystalline microstructures are more resistant to swelling at 700 K due to decreased bubble density. Finally, denuded zone formation had no correlation with grain size and misorientation angle under the conditions studied.

Authors:
 [1];  [2];  [2];  [1];  [3];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Drexel Univ., Philadelphia, PA (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); Laboratory Directed Research and Development (LDRD
OSTI Identifier:
1510150
Alternate Identifier(s):
OSTI ID: 1422929
Report Number(s):
LA-UR-17-31234
Journal ID: ISSN 2166-3831; TRN: US1801673
Grant/Contract Number:  
AC52-06NA25396; SC0008274; AC04-94AL85000
Resource Type:
Published Article
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; He implantation; TEM; bubbles; denuded zones; grain boundary

Citation Formats

El-Atwani, Osman, Nathaniel II, James E., Leff, Asher C., Baldwin, Jon Kevin Scott, Hattar, Khalid, and Taheri, Mitra L. Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation. United States: N. p., 2016. Web. doi:10.1080/21663831.2016.1243591.
El-Atwani, Osman, Nathaniel II, James E., Leff, Asher C., Baldwin, Jon Kevin Scott, Hattar, Khalid, & Taheri, Mitra L. Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation. United States. doi:10.1080/21663831.2016.1243591.
El-Atwani, Osman, Nathaniel II, James E., Leff, Asher C., Baldwin, Jon Kevin Scott, Hattar, Khalid, and Taheri, Mitra L. Tue . "Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation". United States. doi:10.1080/21663831.2016.1243591.
@article{osti_1510150,
title = {Evidence of a temperature transition for denuded zone formation in nanocrystalline Fe under He irradiation},
author = {El-Atwani, Osman and Nathaniel II, James E. and Leff, Asher C. and Baldwin, Jon Kevin Scott and Hattar, Khalid and Taheri, Mitra L.},
abstractNote = {Nanocrystalline materials are radiation-tolerant materials’ candidates due to their high defect sink density. Here, nanocrystalline iron films were irradiated with 10 keV helium ions in situ in a transmission electron microscope at elevated temperatures. Grain-size-dependent bubble density changes and denuded zone occurrence were observed at 700 K, but not at 573 K. This transition, attributed to increased helium–vacancy migration at elevated temperatures, suggests that nanocrystalline microstructures are more resistant to swelling at 700 K due to decreased bubble density. Finally, denuded zone formation had no correlation with grain size and misorientation angle under the conditions studied.},
doi = {10.1080/21663831.2016.1243591},
journal = {Materials Research Letters},
number = 3,
volume = 5,
place = {United States},
year = {2016},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1080/21663831.2016.1243591

Citation Metrics:
Cited by: 2 works
Citation information provided by
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