Tribological Behaviors of Polyamide Modified by Phase Change Particles under High Sliding Velocity

Particles of phase change modified polyamide composites were prepared by filling polymerization. Tribological tests under sliding velocities between 6 m/s and 24 m/s show that, polyamide composites had significantly lower friction coefficients and wear rates compared to pure polyamide, and the properties exhibited self-adaptability with the variation of sliding velocities to a certain degree. When the weight percentage of particle of phase change was low (5%), the composite had low level of self-adaptability. While its weight percentage was high (10%), the composite had strong self-adaptability. Wear mode of pure polyamide was severe adhesive wear, typical abrasive wear and slight adhesion appeared for 5% particle of phase change modified polyamide composite, and mild abrasive wear and slight fatigue wear coexisted for 10% particle of phase change modified polyamide composite.