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Title: Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite

Abstract

The management of irradiation defects is one of key challenges for structural materials in current and future reactor systems. To develop radiation tolerant alloys for service in extreme irradiation environments, the Fe self-ion radiation response of nanocomposites composed of amorphous silicon oxycarbide (SiOC) and crystalline Fe(Cr) were examined at 10, 20, and 50 displacements per atom damage levels. Grain growth in width direction was observed to increase with increasing irradiation dose in both Fe(Cr) films and Fe(Cr) layers in the nanocomposite after irradiation at room temperature. However, compared to the Fe(Cr) film, the Fe(Cr) layers in the nanocomposite exhibited ~50% less grain growth at the same damage levels, suggesting that interfaces in the nanocomposite were defect sinks. Moreover, the addition of Cr to α-Fe was shown to suppress its grain growth under irradiation for both the composite and non-composite case, consistent with earlier molecular dynamic (MD) modeling studies.

Authors:
ORCiD logo [1];  [2];  [2];  [1]
  1. Univ. of Nebraska, Lincoln, NE (United States)
  2. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Univ. of Nebraska, Lincoln, NE (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1613894
Grant/Contract Number:  
NE0008415; AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Crystals
Additional Journal Information:
Journal Volume: 9; Journal Issue: 3; Journal ID: ISSN 2073-4352
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Crystallography; Materials Science; radiation tolerant materials; amorphous silicon oxycarbide; nanocrystalline Fe; composite; interface

Citation Formats

Su, Qing, Wang, Tianyao, Shao, Lin, and Nastasi, Michael. Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite. United States: N. p., 2019. Web. doi:10.3390/cryst9030147.
Su, Qing, Wang, Tianyao, Shao, Lin, & Nastasi, Michael. Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite. United States. https://doi.org/10.3390/cryst9030147
Su, Qing, Wang, Tianyao, Shao, Lin, and Nastasi, Michael. Fri . "Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite". United States. https://doi.org/10.3390/cryst9030147. https://www.osti.gov/servlets/purl/1613894.
@article{osti_1613894,
title = {Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite},
author = {Su, Qing and Wang, Tianyao and Shao, Lin and Nastasi, Michael},
abstractNote = {The management of irradiation defects is one of key challenges for structural materials in current and future reactor systems. To develop radiation tolerant alloys for service in extreme irradiation environments, the Fe self-ion radiation response of nanocomposites composed of amorphous silicon oxycarbide (SiOC) and crystalline Fe(Cr) were examined at 10, 20, and 50 displacements per atom damage levels. Grain growth in width direction was observed to increase with increasing irradiation dose in both Fe(Cr) films and Fe(Cr) layers in the nanocomposite after irradiation at room temperature. However, compared to the Fe(Cr) film, the Fe(Cr) layers in the nanocomposite exhibited ~50% less grain growth at the same damage levels, suggesting that interfaces in the nanocomposite were defect sinks. Moreover, the addition of Cr to α-Fe was shown to suppress its grain growth under irradiation for both the composite and non-composite case, consistent with earlier molecular dynamic (MD) modeling studies.},
doi = {10.3390/cryst9030147},
journal = {Crystals},
number = 3,
volume = 9,
place = {United States},
year = {Fri Mar 01 00:00:00 EST 2019},
month = {Fri Mar 01 00:00:00 EST 2019}
}

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