Investigation of the thermal property and tribological behavior of CaSO₄ whisker-modified paper-based composite friction materials

In this study, CaSO₄ whisker was applied to the paper-based composite friction material as the friction layer (secondary layer) by the paper-making process. The tribological and thermal properties were analyzed. Three-dimensional surface profiles were observed to discuss the wear mechanism. The results showed that the samples with higher CaSO₄ whisker contents owned better thermal resistance. The sample with 4% CaSO₄ whisker content had the highest dynamic friction coefficient. As the CaSO₄ whisker content increased from 0% to 16%, the wear rate decreased first and then increased, and the sample with 8% CaSO₄ whisker content had the highest wear resistance.