Abstract
In order to clarify the effect of Al 2O 3 particle size on the arc erosion behavior of the ceramic-reinforced Al 2O 3/Cu composite, Al 2O 3/Cu composites with different sizes of Al 2O 3 particles were prepared by powder metallurgy, the effect of Al 2O 3 particle size on the characteristics of arc motion was studied, and the mechanism of arc erosion of Al 2O 3/Cu composites was discussed as well. The results show that with decrease in the size of Al 2O 3 particles, the erosion area increases significantly and the erosion pits become shallower. The vacuum breakdown is preferred to appear in the area between Al 2O 3 particle and the copper matrix. Based on the experimental results and theoretical analysis, a particle partition arc model is proposed.
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