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In situ heavy ion irradiation studies of nanopore shrinkage and enhanced radiation tolerance of nanoporous Au

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep39484· OSTI ID:1360711
 [1];  [2];  [2];  [3];  [4];  [2];  [5];  [6]
  1. Texas A & M Univ., College Station, TX (United States). Dept. of Materials Science and Engineering
  2. Purdue Univ., West Lafayette, IN (United States). School of Materials
  3. Texas A & M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). MPA-CINT
  5. Purdue Univ., West Lafayette, IN (United States). School of Materials; Texas A & M Univ., College Station, TX (United States). Dept. of Electrical and Computer Engineering
  6. Purdue Univ., West Lafayette, IN (United States). School of Materials; Texas A & M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
High energy particle radiations induce severe microstructural damage in metallic materials. Nanoporous materials with a giant surface-to-volume ratio may alleviate radiation damage in irradiated metallic materials as free surface are defect sinks. We show, by using in situ Kr ion irradiation in a transmission electron microscope at room temperature, that nanoporous Au indeed has significantly improved radiation tolerance comparing with coarse-grained, fully dense Au. In situ studies show that nanopores can absorb and eliminate a large number of radiation-induced defect clusters. Meanwhile, nanopores shrink (self-heal) during radiation, and their shrinkage rate is pore size dependent. Furthermore, the in situ studies show dose-rate-dependent diffusivity of defect clusters. Our study sheds light on the design of radiation-tolerant nanoporous metallic materials for advanced nuclear reactor applications.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-06NA25396; SC0016337
OSTI ID:
1360711
Report Number(s):
LA-UR--16-29506
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Enhanced Radiation Tolerance of Tungsten Nanoparticles to He Ion Irradiation journal December 2018
In Situ Transmission Electron Microscopy book January 2019
In situ TEM investigation of self-ion irradiation of nanoporous gold journal January 2019
A Review on the Radiation Response of Nanoporous Metallic Materials journal August 2018
Recent Studies on the Microstructural Response of Nanotwinned Metals to In Situ Heavy Ion Irradiation journal November 2019
Influences of Au ion radiation on microstructure and surface-enhanced Raman scattering of nanoporous copper journal March 2018
In situ study on surface roughening in radiation-resistant Ag nanowires journal March 2018
Irradiation resistance of nanostructured interfaces in Zr–Nb metallic multilayers journal March 2019

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