2,315
edits
Changes
no edit summary
Those used in electrical contacts are heterogeneous materials, composed of two or more uniformly dispersed components, in which the largest volume portion consists of a metal.
The properties of composite materials are determined mainly independent from each other by the properties of their individual components. Therefore it is, for example, possible to combine the high melting point and arc erosion resistance of tungsten with the low melting and good electrical conductivity of copper or the high conductivity of silver with the weld resistant metalloid graphite. (<xr id="fig:Powder metallurgical manufacturing of composite materials (schematic)"/>) shows the schematic manufacturing processes from powder blending to contact material. Three basic process variations are typically applied:
*Sintering without liquid phase (Press-Sinter-Repress, PSR)
Main Article: [[Tungsten and Molybdenum Based Materials| Tungsten and Molybdenum Based Materials]]
==Special Contact Materials (VAKURIT) for Vacuum Switches==
The trade name VAKURIT is assigned to a family of low gas content contact materials, are developed for the use in vacuum switching devices [[Special_Contact_Materials_(VAKURIT)_for_Vacuum_Switches|Table 1]] .
Main Article: [[Special Contact Materials (VAKURIT) for Vacuum Switches| Special Contact Materials (VAKURIT) for Vacuum Switches]]
==References==
