期刊
JOURNAL OF NUCLEAR MATERIALS
卷 493, 期 -, 页码 322-329出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2017.06.023
关键词
Copper-graphene nanocomposite; Graphene layers; Radiation resistance; Thermal spike; Molecular dynamics
资金
- Funding of Jiangsu Innovation Programme for Graduate Education [KYLX16_0350]
- Fundamental Research Funds for the Central Universities [NJ20150021]
- Priority Academic Programme Development of Jiangsu Higher Education Institutions
Metalegraphene nanocomposites are expected to have excellent radiation resistance. The intrinsic role of the graphene layers (GrLs) in their performance has not been fully understood. Five copper-graphene nanocomposite (CGNC) systems were used to investigate the detailed mechanisms underpinning this behaviour by atomistic simulation. Results showed that GrLs can reduce the formation, growth, and intensity of the thermal spike of CGNC; this effect became more evident with the increasing number of layers of graphene. The role of the GrLs can be explained by three mechanisms: first, the ultra-strength C-C bonds of graphene hindered the penetration of high-energy atoms, second, the number of recoiled atoms decreased with the increasing number of layers of graphene, and third, the energy dissipation along the graphene planes also indirectly weakened the damage caused to the entire system. These mechanisms may provide a pathway to prevent material degradation in extreme radiation environments. (C) 2017 Elsevier B.V. All rights reserved.
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