ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In the present work, surface-coated Cu nanoparticles with FCC structure and an averagesize of 40 nm were prepared by reducing reaction and surface modification technique. Themorphology and phase structure of the nano-copper were characterized by transmission electronmicroscope (TEM). The ball-on-disc tester and ring-on-block tester were performed to study thetribological properties of surface-coated Cu nanoparticles as oil additive. The tests were carried outunder the lubrication of 50CC oil alone and oil containing surface-coated nano-copper additives. Themorphologies and elementary distributions of the worn surfaces were analyzed by scanning electronmicroscope (SEM) and energy dispersive spectrometry (EDS), respectively. Results indicate thatsurface-coated nano-copper additives can significantly improve the wear resistance and load-carryingabilities of 50CC oil, as well as reduce friction coefficient. A soft copper protective film is formed onthe worn surface lubricated with oil containing nano-copper additives, which separates the wornsurfaces, avoids their direct contact and reduces friction and adhesive wear. Besides, the grooves andsmall valleys on the worn surfaces are found to be partly filled and repaired by nano-copper, as makesthe worn surface repaired and smoother
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.580.pdf
