High temperature radiation responses of amorphous SiOC/crystalline Fe nanocomposite

Su, Qing; Price, Lloyd; Shao, Lin; Nastasi, M.

doi:10.1016/j.jnucmat.2016.07.037

Cited by 18 publications

(5 citation statements)

References 30 publications

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“…For example, recent investigations of Fe/SiOC laminates show that the SiOC phase reduces accumulation of He in the Fe component. Additionally, the crystalline/amorphous interfaces in such composites further reduce displacement damage by absorbing defects from the crystalline Fe 44 , 45 .…”

Section: Discussionmentioning

confidence: 99%

Rapid and damage-free outgassing of implanted helium from amorphous silicon oxycarbide

Ding

Price

et al. 2018

Sci Rep

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Damage caused by implanted helium (He) is a major concern for material performance in future nuclear reactors. We use a combination of experiments and modeling to demonstrate that amorphous silicon oxycarbide (SiOC) is immune to He-induced damage. By contrast with other solids, where implanted He becomes immobilized in nanometer-scale precipitates, He in SiOC remains in solution and outgasses from the material via atomic-scale diffusion without damaging its free surfaces. Furthermore, the behavior of He in SiOC is not sensitive to the exact concentration of carbon and hydrogen in this material, indicating that the composition of SiOC may be tuned to optimize other properties without compromising resistance to implanted He.

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Section: Discussionmentioning

confidence: 99%

Rapid and damage-free outgassing of implanted helium from amorphous silicon oxycarbide

Ding

Price

et al. 2018

Sci Rep

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“…The importance of the amorphous phase has also been indicated in the literature. Amorphous SiOC is conducive to reducing the He accumulation in Fe layers in Fe/SiOC laminates. , Amorphous intergranular films distributed within the Cu–Zr alloy grain boundary network help to decrease the displacement damage by absorbing irradiation-induced defects from the crystalline grains . When a material possesses a higher volume fraction of the amorphous phase, the average path for the absorption of displaced atoms becomes shorter. , Thus, a more amorphous SiOC matrix contributes to efficient defect absorption.…”

Section: Discussionmentioning

confidence: 99%

Radiation Effects in the Crystalline–Amorphous SiOC Polymer-Derived Ceramics: Insights from Experiments and Molecular Dynamics Simulation

Niu

Gao

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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Radiation-tolerant materials are in great demand for safe operation and advancement of nuclear and aerospace systems. Nanostructuring is a key strategy to improve the radiation tolerance of materials. SiOC polymer-derived ceramics (PDCs) are unique synthetic nanocomposites consisting of β-SiC nanocrystals and turbostratic graphite distributed in amorphous SiOC matrix, which are "all-rounder" materials for many advanced structural and functional applications. Radiation effects in the crystalline−amorphous system have been investigated in detail by experiments and molecular dynamics (MD) simulations. The results indicate that the amorphous SiOC structure retains amorphous accompanied by redistribution of the Si-containing tetrahedra. The graphite is shown to amorphize more easily than β-SiC nanocrystals under the same irradiation condition. The sample richer in oxygen, namely, containing more amorphous SiOC, shows less disordering of graphite, resulting from greater mitigation of radiation damage by the amorphous phase as efficient sinks. This study provides details of the microstructure evolution of SiOC PDCs under ion irradiation, as well as insights for the design and development of advanced ion damage-resistant materials.

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“…In addition, amorphous SiOC has been shown to have high crystallization temperatures (over 1300 °C), good oxidation and creep resistance [10][11][12][13][14][15]. Composite systems based on SiOC, such as amorphous-SiOC/crystalline-Fe nanostructures, show enhanced radiation-tolerance due to the presence of amorphous-crystalline interfaces which act as strong sinks for defects [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Strength and plasticity of amorphous silicon oxycarbide

Ming

et al. 2019

Journal of Nuclear Materials

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High temperature radiation responses of amorphous SiOC/crystalline Fe nanocomposite

Cited by 18 publications

References 30 publications

Rapid and damage-free outgassing of implanted helium from amorphous silicon oxycarbide

Rapid and damage-free outgassing of implanted helium from amorphous silicon oxycarbide

Radiation Effects in the Crystalline–Amorphous SiOC Polymer-Derived Ceramics: Insights from Experiments and Molecular Dynamics Simulation

Strength and plasticity of amorphous silicon oxycarbide

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