186
Views
6
CrossRef citations to date
0
Altmetric
Original Articles

Tribological behaviour of silver based self-lubricating composite

, , , , , & show all
Pages 397-404 | Received 21 Mar 2013, Accepted 12 May 2013, Published online: 06 Dec 2013
 

Abstract

Silver based composites with varying concentration of graphite and/or MoS2 were prepared by powder metallurgy method. Impacts of composition on the tribological performance of the composites in ambient air and vacuum were investigated. The lowest friction in air was achieved by Ag–20G (vol.-%) composite, while Ag–20MoS2 exhibited the best lubricity in vacuum. XPS evaluation revealed the oxidation of MoS2 in air and a decrease concentration of graphite on the surface of the wear tracks under vacuum. As the proportion of graphite to MoS2 increased, the friction coefficient and the wear rates ascended gradually in air while decreased sharply under vacuum. As compared with other compositions, Ag–15MoS2–5G exhibited a comparable stable and good tribological performance as the environmental condition changed for its friction coefficient and wear rate remained around 0·14 and 5×10−6 mm3 N−1 m−1.

Acknowledgements

This work was financially supported by the Major Research Program of the National Natural Science Foundation of China (grant no. 91026018), the National Natural Science Foundation of China (grant no. 60979017) and the Doctoral Fund of Ministry of Education of China (grant no. 20110111110015)

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.