The Study Of Vacuum Electrical Performance Of New-style WCu Contact Materials

The WCu contact materials is massively used in the high-voltage switch equipment and the load switch and so on in the switch apparatus , but the security and reliability of the switch lie on the physical property and the electricity characteristic of the contact material at great degree.The fiber reinforced metal matrix composites have the better transverse mechanical property ,the electrical conductivity and the heat conductivity are high, even it has high erosion resistance. We adopt the method of knit-net and fold-layer to knit a two-dimensional net, which take W wire as the line of latitude and the copper wire as the line of longitude. Fold this net and copper ingot, then put them in vacuum sintering furnace. a kind of new-style W/Cu contact materials is produced by infiltration, and the vacuum electrical performance is studied. The gas and impurity content materials are lower。 Simultaneously, The ways avoided nonuniformity of the structure of electrode which because the power is mixed unevenly with the traditional process, and caused the contact materials can't appear partial arc erosion phenomenon.The preparation of the new-style W/Cu contact material and liquid infiltration process of fiber-structured materials are studied concretely in this article. We designed the experimental circuitry at low current, chopping current and arc lifetime and the lever of dielectric strength are measured effectually. anticorrosion property of new-style WCu contact materials is researched by the surface morphology after the arc erosion, according to electric contact and arc theory ,arc erosion mechanism and morphology features are analysed. In a word, vacuum electrical performance of the material is researched generally.These results are meaningful for the research and development of the W/Cu contact materials, and the wider use value for production and application.