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Electrical and tribological properties of a Ni18%Ru alloy for contact applications

Summary: Electrical and tribological properties of a Ni≠18%Ru alloy
for contact applications
Y. Liu ∑ B. S. Senturk ∑ J. V. Mantese ∑
M. Aindow ∑ S. P. Alpay
Received: 20 January 2011 / Accepted: 2 May 2011 / Published online: 12 May 2011
” Springer Science+Business Media, LLC 2011
Abstract A study of the microstructure, development of
contact resistance during oxidation, and abrasive wear
behavior for a Ni≠18 at.%Ru alloy is presented in this
article. It is shown that the alloy can be solutionized and
aged, resulting in a fine lamellar mixture of FCC a-Ni and
HCP b-Ru phases. Upon oxidation in air for 400 h, the
measured contact resistance of the alloy is two orders of
magnitude lower than that of pure Ni after 400-h oxidation.
This behavior results from the formation of a low-resis-
tivity rutile RuO2 scale on the b phase lamellae, which
gives conducting pathways through the insulating NiO
scale that forms on the a phase. After an initial run-in
period, the steady-state abrasive wear rate measured for the
Ni≠Ru alloy is an order of magnitude less than that of pure


Source: Alpay, S. Pamir - Department of Materials Science and Engineering, University of Connecticut


Collections: Materials Science