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使用自制面接触往复式滑动摩擦磨损实验机 ,采用质量分数为 1 %硬脂酸锌水基乳化液作为润滑剂 ,研究了边界润滑状态下外加直流电场对Al2 O3 /Cu摩擦副在低速滑动时的摩擦系数和磨损量的影响 .实验结果显示 :正向电压的施加能够显著地改变摩擦副的摩擦系数 ,外加电压 + 2 0V可使摩擦系数增加约 2 0 0 % ,摩擦系数的改变与外加直流电压的通断是对应的 ,平均响应时间大约为 1min .初步分析结果表明 :外加电场的存在改变了摩擦副上下试件表面硬脂酸盐边界膜的生成与分解的平衡状态 ,从而造成了摩擦副摩擦磨损特性的变化 .外加电压引起的摩擦系数变化之大、对电压变化的响应速度之快说明了利用外加电场来控制摩擦是可行的 .
Using self-made surface contact reciprocating sliding friction and wear testing machine, using 1% zinc stearate water-based emulsion as lubricant, the effect of DC electric field on Al 2 O 3 / Cu friction pair at low speed sliding Of the friction coefficient and the amount of wear.The experimental results show that: the application of the forward voltage can significantly change the friction coefficient of the friction pair, the applied voltage +20 V can increase the friction coefficient of about 200%, the friction coefficient changes with the addition DC voltage on and off is the corresponding, the average response time is about 1min.Preliminary analysis showed that: the presence of external electric field changes the upper and lower specimen frictional stearate boundary film formation and decomposition of the equilibrium state, resulting in Friction pair friction and wear characteristics of the changes in the voltage caused by changes in the friction coefficient, the rapid response to voltage changes shows that the use of additional electric field to control the friction is feasible.