Abstract
The identification of the damage mechanisms involved in the wear process demands the finer scale characterization of the surface, as well as the subsurface region of the wear scar region, and to this end, this article discusses the results obtained with Cu–10 wt% Pb-based metallic nanocomposites using a host of characterization techniques, including transmission electron microscopy and ion milling microscopy. Apart from finer scale characterization to understand deformation and cracking during the wear process, X-ray photoelectron spectroscopy analysis of wear debris confirms the occurrence of oxidation of Pb phase to Pb3O4. In order to understand the role of oxides on friction and wear, sliding wear tests in argon were also carried out and such tests did not result in the formation of any tribo-oxides, as confirmed using electron probe microanalysis. Conclusively, oxidative wear is attributed as the dominant wear mechanism in ambient conditions for Cu–10 wt% Pb composite.
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Acknowledgments
The use of SPS facility at IIT Kanpur, procured with partial funding from Department of Science and Technology, Government of India as well as CARE funding from IIT Kanpur, is gratefully acknowledged. Authors would also like to acknowledge the help rendered by Mr. CS Tiwary, Materials Engineering and Mr. Sanjeet, Materials Research Center, IISc Bangalore for conducting EPMA and XPS experiments, respectively and Mr. Nilesh Hardikar, Harley Instruments, Pune for coordinating Ilion® experimentation.
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Special Issue Editors: Juan Manuel Rojo, Vasileios Koutsos
This article is part of the topical collection on Nanostructured Materials 2012
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Sharma, A.S., Biswas, K. & Basu, B. Fine scale characterization of surface/subsurface and nanosized debris particles on worn Cu–10 % Pb nanocomposites. J Nanopart Res 15, 1675 (2013). https://doi.org/10.1007/s11051-013-1675-5
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DOI: https://doi.org/10.1007/s11051-013-1675-5