skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Self-organization of helium precipitates into elongated channels within metal nanolayers

Abstract

Material degradation due to precipitation of implanted helium (He) is a key concern in nuclear energy. Decades of research have mapped out the fate of He precipitates in metals, from nucleation and growth of equiaxed bubbles and voids to formation and bursting of surface blisters. By contrast, we show that He precipitates confined within nanoscale metal layers depart from their classical growth trajectories: They self-organize into elongated channels. These channels form via templated nucleation of He precipitates along layer surfaces followed by their growth and spontaneous coalescence into stable precipitate lines. The total line length and connectivity increases with the amount of implanted He, indicating that these channels ultimately interconnect into percolating “vascular” networks. In conclusion, vascularized metal composites promise a transformative solution to He-induced damage by enabling in operando outgassing of He and other impurities while maintaining material integrity.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1418768
Report Number(s):
LA-UR-17-25074
Journal ID: ISSN 2375-2548
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Chen, Di, Li, Nan, Yuryev, Dina, Baldwin, Jon Kevin Scott, Wang, Yongqiang, and Demkowicz, Michael J. Self-organization of helium precipitates into elongated channels within metal nanolayers. United States: N. p., 2017. Web. doi:10.1126/sciadv.aao2710.
Chen, Di, Li, Nan, Yuryev, Dina, Baldwin, Jon Kevin Scott, Wang, Yongqiang, & Demkowicz, Michael J. Self-organization of helium precipitates into elongated channels within metal nanolayers. United States. doi:10.1126/sciadv.aao2710.
Chen, Di, Li, Nan, Yuryev, Dina, Baldwin, Jon Kevin Scott, Wang, Yongqiang, and Demkowicz, Michael J. Fri . "Self-organization of helium precipitates into elongated channels within metal nanolayers". United States. doi:10.1126/sciadv.aao2710. https://www.osti.gov/servlets/purl/1418768.
@article{osti_1418768,
title = {Self-organization of helium precipitates into elongated channels within metal nanolayers},
author = {Chen, Di and Li, Nan and Yuryev, Dina and Baldwin, Jon Kevin Scott and Wang, Yongqiang and Demkowicz, Michael J.},
abstractNote = {Material degradation due to precipitation of implanted helium (He) is a key concern in nuclear energy. Decades of research have mapped out the fate of He precipitates in metals, from nucleation and growth of equiaxed bubbles and voids to formation and bursting of surface blisters. By contrast, we show that He precipitates confined within nanoscale metal layers depart from their classical growth trajectories: They self-organize into elongated channels. These channels form via templated nucleation of He precipitates along layer surfaces followed by their growth and spontaneous coalescence into stable precipitate lines. The total line length and connectivity increases with the amount of implanted He, indicating that these channels ultimately interconnect into percolating “vascular” networks. In conclusion, vascularized metal composites promise a transformative solution to He-induced damage by enabling in operando outgassing of He and other impurities while maintaining material integrity.},
doi = {10.1126/sciadv.aao2710},
journal = {Science Advances},
number = 11,
volume = 3,
place = {United States},
year = {Fri Nov 10 00:00:00 EST 2017},
month = {Fri Nov 10 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share: