ISSN   1004-0595

CN  62-1224/O4

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不同润滑状态下表面润湿性的摩擦学特性研究

Tribological Properties of Surface Wettability under Different Lubrication Regimes

  • 摘要: 本文中以锡青铜为基底,采用纳秒紫外激光制备了具有微观粗糙结构的超疏水表面和亲水表面,利用扫描电子显微镜和接触角测量仪对所制备的微观结构和表面润湿性进行了表征,并通过XPS测试对所制备的样片表面润湿性转变的机理进行了分析,通过UMT-2型摩擦磨损试验机测试了在边界润滑及流体动压润滑状态下的摩擦系数,研究表面润湿性对摩擦学特性的影响. 研究结果表明:材料表面润湿性在不同润滑状态下对摩擦学特性有显著的影响;在边界润滑状态下,亲水表面的摩擦学特性优于疏水表面,平均摩擦系数相对减少6.79%;在流体动压润滑状态下,疏水表面的摩擦学特性优于亲水表面,摩擦系数相对减少了10%.

     

    Abstract: In this study, the superhydrophobic surface and hydrophilic surface with micro-rough structure were prepared by using nanosecond ultraviolet laser with tin-bronze as substrate. The microstructure and surface wettability were characterized by scanning electron microscope and contact angle measuring instrument. The mechanism of variation of surface wettability of the prepared sample was analyzed by X-ray phototelectron spectrometer. The influence of the surface wettability on tribological properties under boundary and hydrodynamic lubrication regimes were investigated by measuring the friction coefficients on a UMT-2 friction and wear tester. The results show that the wettability of the material surface had a significant effect on the tribological properties under different lubrication regimes. Under boundary lubrication, the tribological properties of the hydrophilic surface were better than those of the hydrophobic surface, and the average coefficient of friction was reduced by 6.79%. Under hydrodynamic lubrication, the tribological properties of the hydrophobic surface were better than those of the hydrophilic surface, and the average coefficient of friction was reduced by 10%.

     

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