γ-ray radiation effect on properties of CF PTFE/PA6 composites

Carbon fiber-polytetrafluoroethylene/polyamide 6 (CF-PTFE/PA6) composites were prepared using ultrafine PTFE powder as a friction-reducing function filler, and CF as a reinforcement. The CF-PTFE/PA6 composites were irradiated by ⁶⁰Co-γ rays. The mechanical and tribological properties of the composites were studied, and the impact fracture surface morphology of the composites was observed by SEM. The results show that CF-PTFE/PA6 composites with mass fraction of 8% PTFE and 13% CF not only exhibited better mechanical strength and tribological properties, but also possessed higher bending strength, tensile strength and impact strength, which increased by 9.9%, 7.9% and 11.7%, respectively, after optimum adsorbed dose of 120 kGy.