Moisture Dependence of Silver-Graphite Brushes in Air, Nitrogen, Helium, and Carbon Dioxide
- 1 May 1967
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-86 (5) , 616-625
- https://doi.org/10.1109/tpas.1967.291739
Abstract
Wear tests were conducted on silver-graphite brushes sliding against copper slip rings in order to determine moisture levels below which the brushes would dust (wear rapidly). It was found that the brushes would not dust in carbon dioxide at the lowest attainable moisture concentration of 9 to 10 ppm, whereas critical moisture levels were found for the other three gases. The order of increasing moisture dependence for prevention of dusting was as follows: carbon dioxide, air, helium, and nitrogen. Savage's work on graphite adsorptive properties provides the basis for an explanation of these results.Keywords
This publication has 8 references indexed in Scilit:
- A 9ns Electrically Erasable Cmos Programmable Logic DevicePublished by Institute of Electrical and Electronics Engineers (IEEE) ,1988
- An Investigation of the Mechanism of the Friction and Wear of CarbonJournal of Basic Engineering, 1963
- Vapor Lubrication of Graphite Sliding ContactsJournal of Applied Physics, 1956
- Air Humidity and Brush Contact Drop: The Effect of Water Vapor, Sulfur Dioxide, and Hydrogen Sulfide [includes discussion]Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1954
- Electrical Resistance of Carbon Brushes on Copper Rings [includes discussion]Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1954
- Physically and Chemically Adsorbed Films in the Lubrication of Graphite Sliding ContactsAnnals of the New York Academy of Sciences, 1951
- Graphite LubricationJournal of Applied Physics, 1948
- High-Altitude Brush ProblemTransactions of the American Institute of Electrical Engineers, 1944