Tribological Performance of PTFE Bronze Filled Composites under Wide Range of Application Conditions

Abstract

In this study, the friction and wear behavior of pure poly-tetra-fluoro-ethylene (PTFE) and bronze filled PTFE polymer composites at applied load values of 5, 10, 20, 30, 50, 100, 150, and 200N and sliding speed values of 0.32, 0.64, 0.96, 1.0, 1.5, and 2.0 m/s working conditions were examined. Friction and wear experiments were run at ambient conditions using a pin-on-disc test rig. The results for pure PTFE and bronze filled PTFE composites showed that under light working condition, the friction coefficient decreases with the increase in applied load values, while under severe conditions the materials showed less sensitivity to the change in applied load values. Furthermore, among tested materials the lowest wear rate is for bronze filled PTFE composite. The specific wear rate for pure PTFE and 60% bronze filled PTFE are in the order of 10-13 and 10- 15 m2/N, respectively. For the range of applied load and sliding speeds used in this investigation, the friction coefficient and wear rate showed very little sensitivity to the change in sliding test speed and large sensitivity to the change in applied load values. Finally, the wear mechanism of PTFE and PTFE composites include adhesive and deformation mechanisms.

Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

“…Then, plastic deformation appeared on the PTFE surface material and softened the matrix further, resulting in more extensive wear. The observation is consistent with those of few other researchers [33,34]. Figure 6(b) illustrates that apparent grinded groove and "prods" appeared on the wear surface, which indicates that the wear resistance of PEEK is not adequate.…”

Studies on Physical and Mechanical Properties of Silica Fume-Filled Nylon 66 Polymer Composites for Mechanical Components

“…A l t h o u g h v a r i o u s t y p e s o f reinforcements are available for composites, it is very clear from the literature that much research has been carried out on particulate reinforced polymers. Particulates such as copper compounds, zinc, bronze, iron and aluminium powders and potassium titanate whiskers [1][2][3][8][9][10][11][12][13] have been used as reinforcements for various polymers. The mechanical, thermal and wear properties of those composites were studied.…”

Performance properties and applications of polytetrafluoroethylene (PTFE)—a review

“…Bronze content by 60% on PTFE decreases the coefficient of friction for increasing load. PTFE/bronze filled composites exhibited high wear resistance than the unfilled PTFE [99].…”