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Title: Stability of nanosized oxides in ferrite under extremely high dose self ion irradiations

Journal Article · · Journal of Nuclear Materials
 [1];  [1];  [2];  [3];  [4];  [4];  [4];  [4];  [4];  [4];  [1];  [1]; ORCiD logo [5];  [6];  [2]
  1. Univ. of California, Santa Barbara, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
  4. Texas A & M Univ., College Station, TX (United States)
  5. Case Western Reserve Univ., Cleveland, OH (United States)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We produced a nanostructured ferritic alloy (NFA), 14YWT, in the form of thin walled tubing. The stability of the nano-oxides (NOs) was determined under 3.5 MeV Fe+2 irradiations up to a dose of ~585 dpa at 450 °C. Transmission electron microscopy (TEM) and atom probe tomography (APT) show that severe ion irradiation results in a ~25% reduction in size between the unirradiated and irradiated case at 270 dpa while no further reduction within the experimental error was seen at higher doses. Conversely, number density increased by ~30% after irradiation. Moreover, this ‘inverse coarsening’ can be rationalized by the competition between radiation driven ballistic dissolution and diffusional NO reformation. There were no significant changes in the composition of the matrix or NOs observed after irradiation. Modeling the experimental results also indicated a dissolution of the particles.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
AC05-00OR22725; AC52-06NA25396; NE0008297
OSTI ID:
1351787
Alternate ID(s):
OSTI ID: 1340917; OSTI ID: 1419385
Report Number(s):
LA-UR-16-22034; AF5810000; NEAF225; TRN: US1701012
Journal Information:
Journal of Nuclear Materials, Vol. 486, Issue C; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Cited By (4)

Effect of High-Density Nanoparticles on Recrystallization and Texture Evolution in Ferritic Alloys journal March 2019
α′ formation kinetics and radiation induced segregation in neutron irradiated 14YWT nanostructured ferritic alloys journal June 2019
Influence of Al Addition Strategy on the Microstructure of a Low‐Cr Oxide Dispersion‐Strengthened Ferritic Steel journal December 2019
An in situ study on Kr ion–irradiated crystalline Cu/amorphous-CuNb nanolaminates journal March 2019

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