Journal
FUSION SCIENCE AND TECHNOLOGY
Volume 76, Issue 7, Pages 861-868Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15361055.2020.1817704
Keywords
Tritium; polymer; graphene; carbon nanotubes
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Funding
- U.S. Department of Energy [DE-AC09-96R18500]
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By incorporating carbon nanotubes (CNTs) and graphene nanomaterials with aromatic sp2 carbon structures, we have specifically tuned filled ethylene propylene diene monomer elastomer (EPDM) seal and gasket composite materials for radiation resistance. Our results show that CNTs and graphene have an increased ability to stabilize the EPDM matrix compared to standard carbon black (CB) as a radiation-resistant filler. Graphene outperforms both CNT and CB fillers when considering surface damage under conditions where beta exposure is an issue. Both graphene and CNT fillers offer significantly reduced changes in glass transition temperature under prolonged exposure to tritium compared to CB-filled standards, with a 2.5-fold and almost 5-fold reduction, respectively. Thus, CNT- and graphene-filled O-ring materials could be designed that would maintain acceptable seals significantly longer than currently used composites.
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