The transfer film of PTFE composites has a decisive influence on their tribological proper-ties.The quantitative relation between the morphology of the transfer film and the wear rate is of great significance for the optimization of the tribological properties of PTFE composites.In this pa-per,the transfer film thickness and coverage rate of Si3Ni/PTFE composites were quantitatively char-acterized,and the function relation between the transfer film thickness and coverage rate and the wear rate was established.The experiment results show that there is a high degree fit between the maxi-mum thickness and coverage rate of the transfer film and the composite wear rate.The maximum thickness and coverage rate have different effects on the composite wear rate when the transfer film is in different morphologies.When the maximum thickness of the transfer film was greater than 0.319 μm,the increase of the maximum thickness played a leading role in increasing the wear rate of the composites,and when the maximum thickness of the transfer film was less than 0.319 μm,the in-crease of the coverage rate played a leading role in reducing the wear rate of the composites.
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