三维编织复合材料在润滑条件下的摩擦性能

利用树脂传递模塑(RTM)工艺制备了三维编织炭纤维/环氧(C3D/EP)复合材料.采用MM-200型摩擦磨损试验机研究了该材料润滑条件下的摩擦磨损性能,探讨了载荷及滑动速度等外界因素的影响;并采用XL30 ESEM电子显微镜观察磨损表面形貌,分析了其磨损机理.结果表明,润滑条件下复合材料的摩擦磨损性能远优于干摩擦,且磨合期较短;随着载荷的增加,复合材料的摩擦系数和比磨损率降低,但滑动速度对摩擦磨损性能的影响很小;润滑条件下的磨损机理主要是磨粒磨损.

Friction and wear characteristics of 3 -D braided carbon composites under lubricated condition

The three - dimensionally braided carbon fiber reinforced epoxy ( C3D/EP) composites used for bone fracture fixation were prepared by resin transfer mold (RTM) process. The friction and wear characteristics of C3D/EP composites under the lubrication of a buffering liquid (PBS) were investigated on a MM -200 friction and wear tester. The worn surface morphology of composites was observed with a scanning electron microscopy ( SEM ) and the wear mechanism was analyzed. The results show that the composites have greatly decreased friction coefficient and wear rate under the lubricated condition. Load has the same effect on the friction and wear properties of the composites whether under dry sliding or lubricated condition, that is, the friction coefficient and wear rate decrease with the increase of load. Sliding velocity affects the tribological performances slightly. The wear mechanisms of C3D/EP composites with PBS lubrication are fatigue and abrasive wear at a lower pv value and abrasive wear at a higher pv value.