摩擦磨损的接触界面势垒理论研究

Study on Interfacial Potential Barrier Theory of Friction and Wear

根据系统和能量的观点,从摩擦界面的微观相互作用出发,提出摩擦磨损的接触界面势垒理论,研究接触界面势垒和标准接触界面势垒的计算方法,并推导出摩擦力、摩擦系数以及粘着磨损量的计算公式.研究表明,界面的摩擦磨损性能取决于接触界面势垒的大小和分布,用标准接触界面势垒作为表征摩擦副材料摩擦磨损特性的指标具有较好的独立性和稳定性.利用已有的实验数据进行计算,结果与超高真空原子力显微镜实验结果基本符合,验证了所提出理论和方法的可行性.

An interfacial potential barrier theory to calculate friction and wear is proposed by considering micro interaction of frictional surfaces. In the theory, it is suggested that the performance of friction and wear depend on the magnitude and distribution of interfacial potential barrier on the contact surfaces. Then, the calculation methods of interfacial potential barrier and standard interfacial potential barrier were studied and the formulas to calculate friction force, friction coefficient and quantity of adhesion wear were derived according to the theory. The standard interfacial potential barrier can be used as an index to describe the frictional performance of material due to its independency and stability. The calculation results of friction force with some known experimental data are consistent with the experimental results carried out with an ultra high vacuum atomic-force microscope, and it shows that the theory is feasible.