Effect of Soot and Dust Particles on Fretting Wear Properties of Copper under Electrical Contact
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摘要: 采用球/平面接触方式，在自制的电接触磨损试验设备上对紫铜进行电接触微动磨损试验，研究了表面附着的烟炱和灰尘颗粒对紫铜电接触微动磨损性能的影响。结果表明：表面附着灰尘颗粒时的接触电阻远高于附着烟炱颗粒的；烟炱颗粒具有减摩作用，其附着数量的增加会降低试样的摩擦因数，灰尘颗粒则相反；烟炱和灰尘颗粒的引入均延缓了试样的微动磨损，磨痕宽度、磨痕深度和磨损量均与附着颗粒的数量呈负相关。Abstract: By the ball/plane contact method, fretting wear tests under electrical contact were conducted on copper with a self-developed electrical contact wear test setup. The effect of surface-attached soot and dust particles on the fretting wear property of the copper under electrical contact was studied. The results show that the contact resistance with dust particles on surfaces was much higher than that with soot particles on surfaces. The soot particles had an antifriction effect; increasing the number of soot particles reduced the friction coefficient. The dust particles had the opposite effect. Introducing both the soot and the dust particles reduced the fretting wear of the samples; the width and depth of the wear scar, and the amount of wear were all negatively related to the number of particles attached.
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Keywords:
- electrical contact /
- fretting wear /
- soot particle /
- dust particle /
- wear scar
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