Experiments of Tungsten Copper Contacts Electrical Life

Tungsten copper contacts composition performance table of electrical life experiment

Electrical erosion can be measured in a TDR-40A vacuum single-crystal furnace. Cathode material is tungsten copper contacts, a contact material, which has been processed into metallographic sample after polishing, anode material is pure tungsten (Φ = 2mm), they are placed in a vacuum furnace. Plus DC voltage of 8000V (in order to obtain a higher stability) between the anode and the cathode, so that the cathode can rise slowly with the speed of 0.2mm / min, let it close the anode until arc ignite between the anode and the cathode, arc every 30 times, using a precision (0.1mg) analytical balance to measure weight loss of a sample, total arc times is 300 times.

Employ 1000-B-type scanning electron microscope to scan morphology electrical erosion, and electron spectroscopy to analyze changes in the sample composition.



 

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