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:
Friction and wear behavior of fine-grained diamond (FGD) films were investigated in theambient air, deionized water and paraffin oil lubricating environment. The FGD films were depositedon WC substrates using HFCVD method and the tribologcial tests were conducted in a ball-on-platetype reciprocating friction tester where the mating balls were made of ball-bearing steel. Scanningelectron microscopy (SEM), surface profilometer and Raman spectrascropy were used to study thecharacterizations of the deposited FGD films, and after sliding tests, the worn areas on both matingballs and FGD films were investigated and the wear debris layer adhered to the friction area of FGDfilms were analyzed with EDX. The experiment results suggested that FGD films exhibited steadyfriction coefficient as about 0.25 in water, lower than that in open air, which is up to 0.40; but themating ball in water suffered much severer wear lost and its specific wear rate was more than twotimes higher than that in air, up to 3.6E-4 mm3N-1m-1. As while, a thick and compact layer of weardebris was observed on the worn area of FGD films sliding with water lubrication while only littledebris existed in the diamond grain boundaries, which might dominate the friction process andattribute to the lower friction coefficient and higher specific wear rate in water environment. In oilenvironment, furthermore, both the friction coefficient and specific wear rate reached minimum valueas low as 0.1 and 1.1E-4 mm3N-1m-1, no observable wear scar could be measured on the slidingsurface of the FGD film
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.23.pdf
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