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January 28th, 2010

Wear Mechanisms of TiB2 and TiB2–TiSi2 at Fretting Contacts with Steel and WC–6 wt% Co

Published on January 28th, 2010 | By: pwray@ceramics.org

Volume 7 Issue 1, Pages 89 – 103

 

Golla Brahma Raju, Bikramjit Basu
Published Online: Nov 19 2008
12:59PM

DOI: 10.1111/j.1744-7402.2008.02329.x

 

ABSTRACT
Unlubricated fretting wear tests on TiB2 and TiB2–5 wt%
TiSi2 ceramics against two different mating
materials (bearing grade steel and WC–6 wt% Co balls) were performed
with a view to understand the counterbody-dependent difference in
friction and wear properties. The fretting experiments were conducted
systematically by varying load (2–10 N) at an oscillating frequency of
4 Hz and 100 μm linear stroke, for a duration of 100,000 cycles.
Adhesion, abrasion, and three-body wear have been observed as mechanisms
of material damage for both the TiB2/steel and
TiB2/WC–Co tribosystems. The third body is
predominantly characterized as tribochemical layer for TiB2/steel
and loose wear debris particles for TiB2/WC–Co
tribocouple. An explanation on differences in tribological properties
has been provided in reference to the counterbody material as well as
microstructure and mechanical properties of flat materials.

 

Online Access to Journal of Applied Ceramic Technology


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