Combined effects of fretting and pollutant particles on the contact
resistance of the electrical connectors |
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Authors: | Zhigang Kong and Jonathan Swingler |
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Institution: | Research Laboratory of Electrical Contacts, Beijing University of Post and Telecommunications, Beijing, China and School of Engineering & Physical Sciences, Heriot-Watt University, UK |
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Abstract: | Usually, when electrical connectors operate in vibration environments, fretting will be produced at the contact
interfaces. In addition, serious environmental pollution particles will affect contact resistance of the connectors.
The fretting will worsen the reliability of connectors with the pollutant particles. The combined effects of fretting
and quartz particles on the contact resistance of the gold plating connectors are studied with a fretting test
system. The results show that the frequencies have obvious effect on the contact resistance. The higher the
frequency, the higher the contact resistance is. The quartz particles cause serious wear of gold plating, which
make the nickel and copper layer exposed quickly to increase the contact resistance. Especially in high humidity
environments, water supply certain adhesion function and make quartz particles easy to insert or cover the
contact surfaces, and even cause opening resistance. |
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Keywords: | Gold plating
Fretting
Contact failure
Electrical contact |
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