Reinforcing fillers are of great importance in tribological performance and tribofilm formation of polymeric composites. In this study, the tribological properties of aramid particle (AP) and short carbon fiber (SCF) reinforced polyimide (PI) composites were added to hexagonal boron nitride (h-BN), and silica (SiO₂) nanoparticles sliding against alumina were comprehensively investigated. When sliding occurred with AP-reinforced PI composites, the tribological properties were not closely depended on the pressure × velocity (p × ν) factors and the nanoparticles. The interactions between AP and its counterpart could not induce tribo-sintering of the transferred wear debris. As such, the tribofilm seemed to be in a viscous state, leading to higher friction and wear. However, the inclusion of hard SCF into the PI matrix changed the interfacial interactions with alumina. A robust tribofilm consisting of a high fraction of silica was generated when the SCF-reinforced PI was added to the SiO₂ nanoparticles. It exhibited a high load-carrying capability and was easily sheared. This caused a significant decrease in the friction and wear of the PI composite at 8 MPa·1m/s. Moreover, due to their high melting point, few h-BN nanoparticles were observed in the tribofilm of the SCF-reinforced PI when hexagonal boron nitride was added.

增强填料在聚合物复合材料的摩擦学性能和摩擦膜形成中非常重要。在这项研究中，将芳族聚酰胺颗粒（AP）和短碳纤维（SCF）增强的聚酰亚胺（PI）复合材料的摩擦学性能添加到六边形氮化硼（h-BN）中，并且二氧化硅（SiO ₂）纳米颗粒在氧化铝上滑动调查。当AP增强的PI复合材料发生滑动时，摩擦学特性并不紧密取决于压力×速度（p × ν）因子和纳米颗粒。AP和它的对应物之间的相互作用不能引起摩擦磨损碎片的摩擦烧结。这样，摩擦膜似乎处于粘性状态，导致更高的摩擦和磨损。但是，将硬质SCF包含在PI基质中改变了与氧化铝的界面相互作用。当将SCF增强的PI添加到SiO ₂纳米颗粒中时，生成了由高含量的二氧化硅组成的坚固的摩擦膜。它具有很高的承载能力，容易剪切。这导致PI复合材料在8 MPa·1m / s的摩擦和磨损显着降低。此外，由于它们的高熔点，当添加六方氮化硼时，在SCF增强的PI的摩擦膜中几乎没有观察到h-BN纳米颗粒。