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Abstract
The analysis of electrical erosion characteristics of contacts under DC load is conducive to the in-depth study of the arc erosion mechanism. Through the electrical contact experiment, the electrical erosion status of the Pt-Ir-Zr alloy under DC load of 25V/15A is studied in this paper. The results show that: the contacts have excellent anti-welding behavior and lower loss on arc ablation. The separation acceleration of the breaking process between the movable and static contacts is 154.32μm/ms2. The arc erosion surfaces of the material show a large number of paste-like coagulum and bubbles. There are some micro-cracks existing on the surface of the Pt-Ir-Zr alloy contacts. The obvious material transfer phenomenon occurs between the movable and static contacts under DC load.
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