Surface Optimizing Behaviour of Nano-Cu Lubricant to Tribosurfaces by Mechanochemical Process

Abstract:

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A special kind of surface modified copper nanoparticles was selected as the auto-reconditioning materials to in situ generate a copperized protective film on iron-base metal surfaces under designed tribological conditions. The morphologies and element distributions of the formed film were observed and determined by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The micro mechanical properties and tribological behaviors were investigated by nano test system and ball-on-disc tribotester. The results show that the morphology of the protective film is smooth, the nano-hardness decreases by 46% and the friction coefficient of the copperized protective film is about 0.10. The forming mechanism of the auto-reconditioning film can be described that the copper nanoparticles deposit on the worn surfaces and form iron-copper alloy film with lower hardness and shear strength, which has better friction-reducing, antiwear and surface-optimizing behaviors.

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Periodical:

Edited by:

Shen Dong and Yingxue Yao

Pages:

223-227

DOI:

10.4028/www.scientific.net/KEM.339.223

Citation:

P. J. Shi et al., "Surface Optimizing Behaviour of Nano-Cu Lubricant to Tribosurfaces by Mechanochemical Process", Key Engineering Materials, Vol. 339, pp. 223-227, 2007

Online since:

May 2007

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$35.00

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