Dose dependence of radiation damage in nano-structured amorphous SiOC/crystalline Fe composite

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

doi:10.1080/21663831.2015.1103796

Cited by 23 publications

(12 citation statements)

References 21 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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“…One example of such a composite is the Fe/SiOC system, which has exhibited promising thermal and radiation tolerant properties. [24][25][26][27] An interesting feature of the Fe/SiOC system is that it is composed of crystalline metal and amorphous ceramic. Previous studies mainly focus on mixing in either crystalline/crystalline or amorphous/amorphous systems.…”

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confidence: 99%

“…[23,24] For such a situation it will be important to know if the SiOC/metal interface will be stable during irradiation. One example of such a composite is the Fe/SiOC system, which has exhibited promising thermal and radiation tolerant properties.…”

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confidence: 99%

Temperature-dependent ion-beam mixing in amorphous SiOC/crystalline Fe composite

Wang

Cui

et al. 2016

Materials Research Letters

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“…More interestingly, implanted He atoms were found to diffuse out of the SiOC matrix as fast as it was implanted, even at liquid nitrogen temperatures, resulting in time-invariant structure and properties. In addition, amorphous SiOC can be paired with a crystalline metal component such as Fe to form a composite with enhanced thermal, mechanical and irradiation properties [20,21]. However, at present the properties of SiOC/Fe composites under helium implantation, remain virtually uncharted.…”

Section: Introductionmentioning

confidence: 99%

Resistance to Helium Bubble Formation in Amorphous SiOC/Crystalline Fe Nanocomposite

Wang

Gigax

et al. 2018

Materials

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The management of radiation defects and insoluble He atoms represent key challenges for structural materials in existing fission reactors and advanced reactor systems. To examine how crystalline/amorphous interface, together with the amorphous constituents affects radiation tolerance and He management, we studied helium bubble formation in helium ion implanted amorphous silicon oxycarbide (SiOC) and crystalline Fe composites by transmission electron microscopy (TEM). The SiOC/Fe composites were grown via magnetron sputtering with controlled length scale on a surface oxidized Si (100) substrate. These composites were subjected to 50 keV He+ implantation with ion doses chosen to produce a 5 at% peak He concentration. TEM characterization shows no sign of helium bubbles in SiOC layers nor an indication of secondary phase formation after irradiation. Compared to pure Fe films, helium bubble density in Fe layers of SiOC/Fe composite is less and it decreases as the amorphous/crystalline SiOC/Fe interface density increases. Our findings suggest that the crystalline/amorphous interface can help to mitigate helium defect generated during implantation, and therefore enhance the resistance to helium bubble formation.

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Dose dependence of radiation damage in nano-structured amorphous SiOC/crystalline Fe composite

Cited by 23 publications

References 21 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

Temperature-dependent ion-beam mixing in amorphous SiOC/crystalline Fe composite

Resistance to Helium Bubble Formation in Amorphous SiOC/Crystalline Fe Nanocomposite

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