TY - JOUR
T1 - Influence of 'off-contact' electric potential on frictional behaviour of an agate-brass (SiO2-Cu) rubbing couple
AU - Jiang, H.
AU - Wong, P. L.
AU - Meng, Y.
PY - 2001
Y1 - 2001
N2 - The effect of 'off-contact' electric potentials on the frictional behavior of an agate-brass rubbing couple was investigated using a commercial pin-on-disc wear machine. The electric field was set to cover a large portion of the disc surface area but excluding the agate ball and brass contact. This is referred to as the 'off-contact' potential. A suspension of 1 wt% zinc stearate powder dispersed in deionized water was adopted as a lubricant in the experiments. Experimental results show that the coefficient of friction can be increased markedly by imposing a positive biased potential (disc with negative charge) when it exceeds a threshold value. For applying negative biased potentials, there are no obvious effects recorded. Furthermore, the amount of increase in the coefficient of friction by imposing a fixed potential decreases with an increase in the applied load and the sliding speed, but the decreasing rate gradually becomes smaller. Experimental results under a.c. potentials in the frequency range from 0.1 to 100 000 Hz were also presented and no obvious changes in the coefficient of friction for an agate-brass rubbing couple were observed.
AB - The effect of 'off-contact' electric potentials on the frictional behavior of an agate-brass rubbing couple was investigated using a commercial pin-on-disc wear machine. The electric field was set to cover a large portion of the disc surface area but excluding the agate ball and brass contact. This is referred to as the 'off-contact' potential. A suspension of 1 wt% zinc stearate powder dispersed in deionized water was adopted as a lubricant in the experiments. Experimental results show that the coefficient of friction can be increased markedly by imposing a positive biased potential (disc with negative charge) when it exceeds a threshold value. For applying negative biased potentials, there are no obvious effects recorded. Furthermore, the amount of increase in the coefficient of friction by imposing a fixed potential decreases with an increase in the applied load and the sliding speed, but the decreasing rate gradually becomes smaller. Experimental results under a.c. potentials in the frequency range from 0.1 to 100 000 Hz were also presented and no obvious changes in the coefficient of friction for an agate-brass rubbing couple were observed.
KW - Electric potential
KW - Friction
KW - Zinc stearate suspension
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0035157040&origin=recordpage
U2 - 10.1243/1350650011541837
DO - 10.1243/1350650011541837
M3 - RGC 21 - Publication in refereed journal
SN - 1350-6501
VL - 215
SP - 201
EP - 206
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
IS - 2
ER -