Research Institute for Precious Metals and Metals Chemistry
The use of contact lubricants for current-carrying plug connections is the common standard technology in electrical power engineering. The aim of the project is to develop a galvanic silver dispersion coating with self-lubricating properties as an alternative. The particles, in the form of powders, are dispersed into a metal matrix electrolyte and kept in suspension by appropriate electrolyte circulation. The particle incorporation into the silver layer can be controlled by a suitable choice of process and electrolyte parameters. Within the scope of this project, it was possible to incorporate various particles of known solid lubricants (graphite, hBN, SiC, MoS2, WS2, Bi2S3 and SnS) into a silver matrix electrochemical deposition. Ag-graphite was used as a reference system for evaluating the friction and wear behavior of the other particles. While dispersion depositions with hBN, SiC, Bi2S3 and SnS showed no significant tribological improvement compared to pure silver, dispersion depositions containing WS2 and MoS2 showed promising tribological properties.
Abstract
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