Arc Erosion Experiment of New Tungsten Copper Contacts Material

Preparing a fibrous structure of tungsten copper contact materials --- tungsten fibers (having a certain directionality) instead of tungsten powder, by two-dimensional weaving method, leaving a small amount of copper for the induction of copper, fiber and copper tungsten blank stack together, then place them in a vacuum sintering furnace for infiltration sintering, then fibrous tungsten can be obtained.
The diameter of sample 1 is 0.12mm, who is the fiber structure; sample 2 is WCu30 sintering by mixed powder; sizes of the two samples are 10mm * 10mm * 10mm.

Carry out arc erosion experiments by using TDR-40A vacuum single-crystal furnace, pure tungsten is anode, cathode is tungsten fibers after polishing, place the two electrodes in a vacuum chamber, placement: next anode, a cathode on. The voltage is 7400V; the maximum current is 80A. Anode move with 0.2mm / min speed to the cathode until the arc discharge, discharge waveforms recorded with an oscilloscope, and then transport to a computer. Wait until the release is finished, the cathode move up, in every arc 10 times, the samples were removed, using an accuracy of 0.1mg electronic balance measures the sample weight loss, repeat the above steps, each sample 50 times.

 

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