Wear reduction mechanism of graphite and MoS2 in epoxy composites

Mechanical and Abrasive Wear Behavior of Metal Sulphide Lubricant Filled Epoxy Composites

“…The experimental aspects related to the voids and/or pores which strongly affect the mechanical properties of brittle materials such as thermoset polymer like the epoxy resin used here are mainly responsible for the deterioration in the mechanical properties. This phenomenon of reduction in mechanical properties of polymer composites with addition of solid lubricant was also noticed by earlier researchers [7,8,16]. Further investigation is, however, warranted to verify the lubricant effects on mechanical properties at lower loadings.…”

“…Polymers filled with solid lubricant (SL) have been extensively studied because of the increasing industrial and material applications. Several researchers [4][5][6][7][8][9][10][11][12][13][14] have revealed variation in properties of polymer composites filled with solid lubricants such as graphite, molybdenum disulphide (MoS 2 ), and polytetrafluoroethylene (PTFE).…”

“…It was also observed that PTFE-filled PPESK composites showed much smoother surfaces than same concentration composites filled by graphite. Li et al [7] demonstrated the combined effect of using two solid lubricants (Graphite and MoS 2 ) for improving the triboperformance of polymer composites. Many researchers [8][9][10][11][12][13] have proposed that solid lubricant alone will not improve the tribo-performance of neat polymer and along with fiber reinforcement will have beneficiary effect on the performance of composites.…”

The Role of Solid Lubricants for Brake Friction Materials

“…However, even for pure graphite powder, the COF was still near to 0.3 which is much higher than the one observed for the C/C couple at ambient temperature (0.15) [17,18]. Although not designed for brake application, it is interesting to look at the results obtained with epoxy coatings filled with graphite and MoS 2 particles [24,25]. While rubbed against steel discs, the pure epoxy provided a COF of 0.5 and 0.55, according to [24] and [25], respectively.…”

“…Although not designed for brake application, it is interesting to look at the results obtained with epoxy coatings filled with graphite and MoS 2 particles [24,25]. While rubbed against steel discs, the pure epoxy provided a COF of 0.5 and 0.55, according to [24] and [25], respectively. Epoxy filled with at least 10 wt % graphite provided a COF of 0.35 which remained constant with increasing graphite content [25] or decreased slightly to 0.25 [24].…”