By Topic

Electrical instabilities in stationary contacts: Al/plated-brass junctions

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Timsit, R.S. ; Alcan Int. Ltd., Kingston, Ont., Canada

The electrical stability of stationary point contacts in oxygen gas and in ultrahigh vacuum is examined. The localized junctions were formed by the contact of two hemispherical surfaces consisting, respectively, of aluminum and 70 Cu/30 Zn brass plated with either In, Sn or Zn. The contact-spot temperature was determined by the magnitude of a direct electrical current. The contact spots were found to grow rapidly in vacuum, irrespective of contact temperature, but eroded in the presence of oxygen gas. This erosion usually led to catastrophic failure. Junctions generated with Sn- and In platings generally `self-healed' (i.e. developed and maintained a low contact resistance) after contact melting, whereas contacts formed with Zn platings did not reveal self-heal characteristics. Possible causes for contact degradation in oxygen gas are discussed

Published in:

Components, Hybrids, and Manufacturing Technology, IEEE Transactions on  (Volume:11 ,  Issue: 1 )