Friction and Wear Behavior of Polyamide 66 Composites Filled with Rice Bran Ceramics under a Wide Range of Pv Values

Abstract

Hard particulate fillers are used to improve the mechanical and tribological properties of thermoplastic resins. In this study, we investigated the fundamental tribological behavior of polyamide 66 (PA66) resin composites containing rice bran ceramics (RBC) particles at a wide range of pressure-velocity (Pv) values under dry conditions. Irrespective of Pv value, PA66/RBC composite exhibited relatively low friction coefficients (0.4), whereas the friction coefficients for pure PA66 increased. In addition, the PA66/RBC composite better prevented an increase in the surface temperature compared with pure PA66 at high Pv values. To distinguish the effect of the flowability of the resin, surface temperatures normalized by the glass transition temperature were defined. The specific wear rates of pure PA66 changed with the normalized surface temperature because the wear mode transited. Low specific wear rates (–8 mm2/N) were obtained for the PA66/RBC composite without the transition of the wear mode against the normalized surface temperature. These wear rates were reduced by 55-86% compared with those of pure PA66.

Keywords

• resin composite
• hard particulate filler
• friction
• sliding wear
• pv value
• normalized surface temperature