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Title: Helium Irradiation and Implantation Effects on the Structure of Amorphous Silicon Oxycarbide

Journal Article · · Scientific Reports

Despite recent interest in amorphous ceramics for a variety of nuclear applications, many details of their structure before and after irradiation/implantation remain unknown. Here we investigated the short-range order of amorphous silicon oxycarbide (SiOC) alloys by using the atomic pair-distribution function (PDF) obtained from electron diffraction. The PDF results show that the structure of SiOC alloys are nearly unchanged after both irradiation up to 30 dpa and He implantation up to 113 at%. TEM characterization shows no sign of crystallization, He bubble or void formation, or segregation in all irradiated samples. Irradiation results in a decreased number of Si-O bonds and an increased number of Si-C and C-O bonds. This study sheds light on the design of radiation-tolerant materials that do not experience helium swelling for advanced nuclear reactor applications.

Research Organization:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NE0000533
OSTI ID:
1426206
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (6)

Influence of Metal Additives on Microstructure and Properties of Amorphous Metal–SiOC Composites journal April 2019
Rapid and damage-free outgassing of implanted helium from amorphous silicon oxycarbide journal March 2018
Mechanical Response of He-Implanted Amorphous SiOC/Crystalline Fe Nanolaminates journal March 2019
Mechanical size effects of amorphous polymer-derived ceramics at the nanoscale: experiments and ReaxFF simulations journal January 2019
Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite journal March 2019
Resistance to Helium Bubble Formation in Amorphous SiOC/Crystalline Fe Nanocomposite journal December 2018

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