Effect of the environment factors on the electrical contact
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Effect of the environment factors on the electrical contact
Wed, 30/03/2016 - 16:00 to 17:00
Location:
Speaker:
Dr. Zhigang Kong
Affiliation:
Beijing University
Synopsis:
Electrical contact failure is the main form of connector degradation. Environmental vibration, temperature change, contamination are the main factors to lead to the failure. When electrical connectors are in the dynamic environments, fretting or small distance motion will be produced between the interfaces of contact pair. Fretting wear and fretting corrosion of contact interface occur simultaneously during micro-motion. The fretting can induce chemical and topographical changes and the formation of oxide particles. At the same time, serious contamination formed on contact surface is one of the main causes of electrical contact failure. These contaminations may be due to surface oxidation, dust deposition and corrosion of contact material. When contaminations are deposited on the plating, they may enhance the corrosion and also cause high contact resistance.
Biography:
Zhi-Gang Kong received his Ph.D. degree in 2007 from Beihang University. He is at present an associate professor with Beijing University of Posts & Telecommunications. He is also a research staff of the Research Lab of Electric Contacts of the university. He is an academic visitor in Heriot-Watt University now from February of 2016 to January of 2017. His research interests include the reliability of electrical contacts. He has more than 10 papers in journals and conference proceedings.