On the Electro-Tribological Properties and Degradation Resistance of Silver-Aluminum Coatings
| Autor: | Andrés del Barrio, Ulf Jansson, Pedro Berastegui, I. Braceras, Mamoun Taher, Iñigo Ibáñez, Fang Mao, Anna M. Andersson, Saioa Saenz De Urturi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Transformer oil Electro-tribology chemistry.chemical_element 02 engineering and technology 0203 mechanical engineering Aluminium Phase (matter) Ag-Al coatings Oil immersion Materials Chemistry Adhesive wear Composite material Surfaces and Interfaces H2S test Tribology 021001 nanoscience & nanotechnology Condensed Matter Physics Electrical contacts Surfaces Coatings and Films PVD 020303 mechanical engineering & transports chemistry Mechanics of Materials Degradation (geology) Electrical Contact Resistance 0210 nano-technology |
| Popis: | Contact materials in sliding electrical applications must possess low electrical contact resistance, low friction and wear coefficients, and high degradation resistance to the surrounding media. Silver coatings are commonly used in such applications despite their shortcomings. This work has focused on the study of alternative silver-aluminum coatings deposited by PVD. The main findings include the strong dependence of the tribological performance on the concentration of Al and hence the phases present in the coatings. Besides, the wear mechanism was found to be affected by the working media, either on air or insulating oil. Results have shown that for full HCP phase coatings (Ag67Al33), wear rates are lowest, with no adhesive wear and good surface sulphidation resistance, though with some proclivity to oxidation, coupled with a moderate increase in the electrical contact resistance. This work was supported by COMET (partially funded by KIC InnoEnergy) and nG-17 (Elkartek funding from the Economic Development Department at the Basque Government) projects. |
| Databáze: | OpenAIRE |
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