Experiments of Tungsten Copper Contacts Electrical Life
- Details
- Category: Tungsten Information
- Published on Monday, 27 July 2015 17:17
Tungsten copper contacts composition performance table of electrical life experiment
|
Experiment material |
Density (g / cm³) |
Hardness (HV10) |
Conductivity (* 106S / m) |
Gas content(*10-6) |
|
W70Cu30 |
14-14.5 |
175-200 |
21-27 |
＜35（O2+N2） … |
|
W80Cu20 |
16.7-17 |
250-280 |
16-20 |
|
|
W90Cu10 |
15.2-15.6 |
210-250 |
18-23 |
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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