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Abstract: Theoretical
and experimental researches show that electro-viscosity by electric
double layer (EDL) apparently influences on thin film lubrication (TFL).
In order to consider the influence of EDL, some tests with a composite
sliding block are carried out by the way that external electric field is
used to reconstruct EDL with water used as lubricant. Results showed
that EDL has apparent effect on friction coefficient. To ensure the
results, further tests are done where aqueous KCl solution is used as
lubricant. The influence of electro-viscosity on friction coefficient is
studied by changing concentration of KCl. Results showed that EDL has
apparent effect on friction coefficient in TFL, 30% in increase.
Finally, numerical analysis is also carried out to show the effect of
EDL electro-viscosity on friction coefficient in TFL.
Key words:
Electric double layer Electro-viscosity Friction coefficient External
electric field
CLC No: TH117
国家自然科学基金(50375052)和广东省教育厅“千百十工程”优秀人才培养基金资助项目. Received 20030417,
received in revised form 20031210
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