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The Study of Tribological Performance and Surface Film Characterization of Bismuth Dioctyldithiocarbamate

Published online by Cambridge University Press:  15 February 2011

Chen Ligeong
Affiliation:
Logistical Engineering College, Chongqing 630042, P.R.of China
Dong Junxiu
Affiliation:
Logistical Engineering College, Chongqing 630042, P.R.of China
Chen Guoxu
Affiliation:
Logistical Engineering College, Chongqing 630042, P.R.of China
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Abstract

In this study, bismuth dioctyldithiocarbamate has been synthesized, and Its tribological behaviors, such as friction-reducing ability, antiwear property and extreme pressure performance have been respectively evaluated with a ring-on-block test rig and a fourball machine. In addition to correlate its tribological behaviors with the film formed on the metallic rubbing surface under boundary lubrication conditions, surface analyses have been conducted to characterize the surface film by means of Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy(XPS) and energy dispersion of X-ray (EDX).

Test results show the additive compound can effectively improve the friction and wear of the rubbing couples. On the other hand, EDX confirmed the presence of carbon, oxygen, sulfur, nitrogen, bismuth and iron on the surface; AES revealed their depth distribution of atomic concentration percentages. Whereas XPS further disclosed that the composition of the surface film was composed of organic and inorganic species including iron sulfide and sulfate, metallic bismuth, bismuth oxide and sulfide etc. which are conducive to the reduction of friction and wear.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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