Electrical Erosion Characteristics of Pt-Ir-Zr Alloy Contact under DC Load

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.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 191-195
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.191
• Online since: September 2013
• Authors: Sai Bei Wang, Song Wang, Ming Xie, Ji Ming Zhang, You Cai Yang, Yong Tai Chen, Man Men Liu, Jie Qiong Hu
• Keywords: Electrical Erosion, Pt-Ir-Zr Alloy, Surface Morphology

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