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Tribological Characteristics of Nanocrystalline Copper

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Abstract:

In the present study, two sets of powder metallurgy copper samples, with grain sizes of 99 nm and 63 nm, respectively, were investigated under different tribological conditions. The wear behavior of these materials was studied through a pin-on-disc configuration using sliding velocities of 0.5, 1 and 2 m/s with normal loads of 10 and 30 N. The finer-grained copper was able to outperform (by between 4- to 16-fold) its coarser-grained counterpart under severe test conditions, but no advantage was observed when conditions were milder. Scanning electron microscopy revealed the dominant wear mechanisms to be oxidative wear under mild sliding, with a transition to adhesive wear with increases in sliding speed and normal load.

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Periodical:

Journal of Metastable and Nanocrystalline Materials (Volume 23)

Pages:

267-270

DOI:

https://doi.org/10.4028/www.scientific.net/JMNM.23.267

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Online since:

January 2005

Authors:

M. Shanthi, C.Y.H. Lim, Manoj Gupta

Keywords:

Mechanical Milling, Nanocrystalline Copper, Powder Metallurgy (PM), Wear Mechanism

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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