Format

Send to

Choose Destination
Sci Rep. 2016 Apr 21;6:24785. doi: 10.1038/srep24785.

Radiation Resistant Vanadium-Graphene Nanolayered Composite.

Author information

1
Graduate School of Energy, Environment, Water and Sustainability, Korea Advanced Institute of Science &Technology, Daejeon 305-338, Korea.
2
Department of Materials Science and Engineering and Graphene Research Center of KI for the NanoCentury, Korea Advanced Institute of Science &Technology, Daejeon 305-338, Korea.
3
Department of Mechanical Engineering, Korea Advanced Institute of Science &Technology, Daejeon 305-338, Korea.

Abstract

Ultra high strength V-graphene nanolayers were developed for the first time that was demonstrated to have an excellent radiation tolerance as revealed by the He(+) irradiation study. Radiation induced hardening, evaluated via nanopillar compressions before and after He(+) irradiation, is significantly reduced with the inclusion of graphene layers; the flow stresses of V-graphene nanolayers with 110 nm repeat layer spacing showed an increase of 25% while pure V showed an increase of 88% after He(+) dosage of 13.5 dpa. The molecular dynamics simulations confirmed that the graphene interface can spontaneously absorb the nearby crystalline defects that are produced from a collision cascade, thereby enhancing the lifetime of the V-graphene nanolayers via this self-healing effect. In addition, the impermeability of He gas through the graphene resulted in suppression of He bubble agglomerations that in turn reduced embrittlement. In-situ SEM compression also showed the ability of graphene to hinder crack propagation that suppressed the failure.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center