Environmental effects on the electrical performance of silver contact - substrate systems

Dervos Constantine, T; Vassiliou, Panayota

dc.contributor.author	Dervos Constantine, T	en
dc.contributor.author	Vassiliou, Panayota	en
dc.date.accessioned	2014-03-01T02:41:32Z
dc.date.available	2014-03-01T02:41:32Z
dc.date.issued	1998	en
dc.identifier.issn	03614395	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30518
dc.subject	Copper	en
dc.subject	Design Rules	en
dc.subject	Energy Storage	en
dc.subject	Environmental Effect	en
dc.subject	Scanning Electron Microscopy	en
dc.subject.other	Air pollution	en
dc.subject.other	Corrosion	en
dc.subject.other	Degradation	en
dc.subject.other	Electrochemistry	en
dc.subject.other	Electron microscopy	en
dc.subject.other	Environmental impact	en
dc.subject.other	Erosion	en
dc.subject.other	Silver	en
dc.subject.other	Sodium chloride	en
dc.subject.other	Sulfur dioxide	en
dc.subject.other	Surfaces	en
dc.subject.other	Welds	en
dc.subject.other	Electrochemical degradation	en
dc.subject.other	Energy dispersive analysis	en
dc.subject.other	Silver metal contacts	en
dc.subject.other	Synergy effects	en
dc.subject.other	Electric contacts	en
dc.title	Environmental effects on the electrical performance of silver contact - substrate systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/HOLM.1998.722454	en
heal.identifier.secondary	http://dx.doi.org/10.1109/HOLM.1998.722454	en
heal.publicationDate	1998	en
heal.abstract	In this work, commercial silver metal contacts welded on top of brass or silver plated copper substrates have been exposed to air rich in SO2 and air rich in NaCl. Scanning Electron Microscopy and Energy Dispersive Analysis of the exposed contact surfaces were performed to identify the corrosion byproducts on top of the silver contacts, substrates, and welding materials. Surface corrosion products were mainly found to consist of small spherules of Cu-Zn or Ag-Cu compounds which cover the surface of the contact proper with low adhesion properties. They mainly originate from under the plating of the substrate or from the welding materials. Electrical characterization of the contacting materials was based upon dc temperature overheat tests, current switching cycle tests, and energy storage during ac current excitation. The experimental results display that the operating environment is indeed a very significant parameter determining the overall performance of the electrical contacts. New design rules as well as material selection properties may have to be systematically considered to allow for electrochemical induced degradation in heavy pollutant operating environments.	en
heal.publisher	IEEE, Piscataway, NJ, United States	en
heal.journalName	Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts	en
dc.identifier.doi	10.1109/HOLM.1998.722454	en
dc.identifier.spage	256	en
dc.identifier.epage	268	en