Thickness and coverage rate are the two most important parameters to characterize the transfer film morphology. In this paper, according to the uneven distribution on the transfer film stacking direction (thickening direction), different characteristic values of transfer film thickness in the same observation area were obtained statistically. Meanwhile, optimal thickness which was the most related to wear rate of the SiO₂/PTFE composite was acquired. The results showed that the transfer film maximum thickness had the best correlation with wear rate of the composite. In our experiment, the greater the maximum thickness of the transfer film, the lower the wear rate; similarly, the greater the coverage rate of the transfer film, the lower the wear rate.

厚度和覆盖率是表征转移膜形态的两个最重要的参数。本文根据转印膜堆叠方向（加厚方向）上的不均匀分布，统计得到同一观察区域内转印膜厚度的不同特征值。同时，获得了与SiO ₂ /PTFE复合材料的磨损率最相关的最佳厚度。结果表明，转移膜最大厚度与复合材料的磨损率相关性最好。在我们的实验中，转印膜的最大厚度越大，磨损率越低；同样，转印膜的覆盖率越大，磨损率越低。