纳米氮化铝填充聚四氟乙烯复合材料的性能研究

采用高速混合、冷压烧结成型的方法制备了聚四氟乙烯/纳米氮化铝（PTFE/nano AlN）复合材料，考察了nano AlN含量对复合材料结晶性能、力学性能与摩擦性能的影响，并采用扫描电子显微镜对样品磨损表面进行分析。结果表明：随着nano AlN含量的增加，复合材料的结晶度呈现先增大后降低的趋势；nano AlN可显著提高复合材料的力学性能与耐磨损性能，当其含量为4 %时，耐磨损性能与纯PTFE相比提高了2个数量级。

Study on Properties of Nano AlN Filled PTFE Composites

PTFE/nano aluminum nitride (nano AlN) composites were prepared from nano AlN particles and polytetrafluoroethylene (PTFE) powder by high speed mechanical mixing followed by cold moulding and sintering in air. Effect of nano AlN content in the composites on crystallization, mechanical, and tribological properties was studied. The worn surface morphology of the composites was characterized and analyzed by scanning electron microscope. It showed that the degree of crystallinity first increased and then decreased as the weight percentage of nano AlN increased; the mechanical properties and wear resistance of the composites were improved by nano AlN particles remarkably. The wear resistance of PTFE/4 % nano AlN composite was increased by two orders of magnitude compared to neat PTFE.