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

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 condu...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2010-01, Vol.7 (1), p.89-103
Main Authors: Brahma Raju, Golla, Basu, Bikramjit
Format: Article
Language:English
Subjects:
Abrasion resistance
Cemented carbides
Cobalt
Fretting
Steels
Titanium diboride
Tungsten carbide
Wear
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Summary: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.
ISSN:1546-542X
1744-7402
DOI:10.1111/j.1744-7402.2008.02329.x