With the increasing installed capacity of the power grid and the gradual improvement of voltage level

the more demanding for arc ablation resistance of the electrical contact

which is the core element of circuit breakers

is raised. A micro graphene is introduced into CuW80 alloy by the sintering and infiltration process

the highenergy arc resistance behavior variation of CuW80 alloy before and after adding graphene in SF

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atmosphere are studied in this paper. The results show that the electrical conductivity and hardness of CuW80-Gr alloy are improved compared with CuW80 alloy due to the excellent electrical conductivity of graphene and the excellent mechanical properties of tungsten carbide ceramic particles formed by carbonization with W particles. SF

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is easy to ionize and produce gas ions to maintain arc combustion at high pressure. The first breakdown of CuW80 alloy results in obvious ablation

and the average withstanding voltage strength in the 30 times breakdown process is significantly lower than that in the breakdown of vacuum environment. After the addition of graphene

due to the improvement of graphene on the viscosity of molten Cu liquid and the effect of carbonization to generate ceramic particles to disperse arc

the arc ablation resistance of CuW80-Gr alloy is improved compared with CuW80 alloy

and the ablation mass loss is significantly reduced.