A molecular dynamics simulation study on the role of graphene in enhancing the arc erosion resistance of Cu metal matrix

Xu, Ruoyu; Zhou, Mingyu; Wang, Xin; Matharage, S. Y.; Yan, Joseph; Connolly, Andrew M.; Luo, Yi; Ding, Yi; Wang, Zhongdong

doi:10.1016/j.commatsci.2022.111549

Cited by 9 publications

(8 citation statements)

References 60 publications

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“…Although the superiority of graphene addition has been demonstrated from the perspective of material properties and ablation resistance, successful preparation of graphene-CuW electrical contact products has not been achieved. Furthermore, no studies have been conducted on the performance of graphene-enhanced CuW electrical contacts under actual interruption conditions in circuit breakers, lacking the guiding significance in actual use [18,[28][29][30]. In this study, graphene-enhanced CuW80 composites and electrical contacts have been successfully prepared for the first time.…”

Section: Ablation Resistance Of Graphene-enhanced Cuw Electrical Cont...mentioning

confidence: 99%

“…It is unable to achieve the coordinated improvement of the comprehensive performance. Graphene, as a new two-dimensional carbon material rising in recent years, has remarkable advantages such as high electrical conductivity, high thermal conductivity, high specific surface area, light weight, and high strength [23][24][25][26][27][28][29][30]. It will be an ideal material for the modification of CuW composites, and is expected to bring more excellent comprehensive properties as an additive modification phase.…”

Section: Introductionmentioning

confidence: 99%

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Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Liu,

Han,

Jia

et al. 2024

Applied Sciences

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To address the issue of over-standard short-circuit currents in a power system, it is imperative to enhance the comprehensive performance of the electrical contacts, which serve as the lynchpin of circuit breakers, so as to improve the breaking capacity of high-voltage circuit breakers. Graphene, as the most prominent two-dimensional carbon material in recent years, has garnered widespread applications across various fields. In this study, graphene-enhanced CuW composites for high-voltage circuit breaker electrical contacts were prepared innovatively using integrated vacuum infiltration technology. The innovative graphene-enhanced CuW composites significantly improved the mechanical, electrical, and ablation resistance properties, and have been successfully applied in the 252 kV/63 kA high-voltage SF6 circuit breakers, achieving 20 times effective consecutive full-capacity short-circuit current breaking. It provides a new route for the development and application of high-performance CuW electrical contacts. Looking ahead, it is planned to extend their application to higher voltage grade high-voltage circuit breakers.

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Section: Ablation Resistance Of Graphene-enhanced Cuw Electrical Cont...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Liu,

Han,

Jia

et al. 2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

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“…Then, three models' atom layers at all four vertical surfaces are forced to maintain 300 K to prevent the waves caused by the bombardment from returning through the periodic boundary. It is noted that neutral sulphur (S) atoms instead of S ions are used to bombard the models in the simulation, as ions are neutralised before bombarding the surface in the practical working environment [3]. Due to the complexity of arc erosion process, only the impact of ion bombardment is studied as one of the critical erosion processes in this work.…”

Section: Simulation Detailsmentioning

confidence: 99%

Electrical Erosion Resistance of Graphene Reinforced Cu-W Circuit Breaker Contact Materials under 5 kA Arc

Wang,

Zhou,

Connolly

et al. 2023

PPT

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This work integrates experimental and MD simulation approaches to study the role of graphene in G-Cu-W composites. Arcing tests were conducted on G-Cu-W and Cu-W contact samples under a 5kA peak current. Experimental results show that adding graphene leads to a lower surface roughness of the sample following arcing. MD simulation results indicate that the G-Cu-W model exhibits a smoother surface and fewer lost metal atoms than the Cu-W model due to the protective effect of graphene layer.

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“…Guo et al [11] compared crack extension in single-crystal copper and copper/graphene composites using MD simulations, and found that the incorporation of graphene was beneficial in suppressing crack extension. Xu et al [12] investigated the effect of graphene on the arc erosion resistance of Cu using MD simulations. The results showed that the graphene layer can dissipate the energy transferred by the incident ions through the shock wave and prevent the recoiling Cu atoms from penetrating into the graphene layer, which produces a better arc erosion performance than the pure Cu system.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Study of the Deformation Behavior and Strengthening Mechanisms of Cu/Graphene Composites under Nanoindentation

Ren,

Zhou,

et al. 2024

Crystals

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The mechanical performance of pure copper can be significantly strengthened by adding graphene without greatly sacrificing its electrical and thermal conductivity. However, it is difficult to observe the deformation behavior of Cu/graphene composites efficiently and optically using experiments due to the extremely small graphene size. Herein, Cu/graphene composites with different graphene positions and layers were built to investigate the effect of these factors on the mechanical performance of the composites and the deformation mechanisms using molecular dynamics simulations. The results showed that the maximum indentation force and hardness of the composites decreased significantly with an increase in the distance from graphene to the indentation surface. Graphene strengthened the mechanical properties of Cu/graphene composites by hindering the slip of dislocations. As the graphene layers increased, the strengthening effect became more pronounced. With more graphene layers, dislocations within the Cu matrix were required to overcome higher stress to be released towards the surface; thus, they had to store enough energy to allow more crystalline surfaces to slip, resulting in more dislocations being generated.

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A molecular dynamics simulation study on the role of graphene in enhancing the arc erosion resistance of Cu metal matrix

Cited by 9 publications

References 60 publications

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Electrical Erosion Resistance of Graphene Reinforced Cu-W Circuit Breaker Contact Materials under 5 kA Arc

Molecular Dynamics Study of the Deformation Behavior and Strengthening Mechanisms of Cu/Graphene Composites under Nanoindentation

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