自润滑纤维织物复合材料摩擦学性能研究

目的研究MoS_2和石墨填充对自润滑纤维织物复合材料摩擦学性能的影响。方法采用玄武三号栓-盘式摩擦磨损实验机,研究了石墨和MoS_2填充PTFE/棉纤纤维织物在不同载荷条件下的摩擦磨损性能,并采用扫描电镜观察了纤维织物复合材料的磨损表面和微观结构。结果在较低载荷下,填充5%MoS_2可以更有效地降低PTFE/棉纤纤维织物复合材料的磨损率;在较高载荷下,填充10%石墨可以更有效地降低PTFE/棉纤纤维织物复合材料的磨损率。载荷为219.52 N时,5%MoS_2填充PTFE/棉纤纤维织物复合材料的磨损率由未填充的1.28×10~(-14) m~3/(N·m)降低到0.61×10~(-14) m~3/(N·m),降低了50%;10%石墨填充PTFE/棉纤纤维织物复合材料的磨损率由1.28×10~(-14) m~3/(N·m)降低到0.91×10~(-14) m~3/(N·m),降低了28%。结论石墨和MoS_2填充在摩擦过程中减轻了磨粒的嵌入和切削作用,阻碍了复合材料的磨损,提高了PTFE/棉纤纤维织物复合材料的耐磨性能。

Tribological Properties of Self-lubricating Fabric Composites

The work aims to study effects of MoS2 and graphite filling on tribological properties on self-lubricating fabric composites.Friction and wear properties of MoS2 and graphite-filled PTFE/cotton fabric were studied under various loading conditions,and worn surface and microstructure of the fabric composites were observed with scanning electron microscopy (SEM).Under lower loads,filling with 5％ MoS2 could reduce wear rate of PTFE/cotton fabric composites more effectively;whereas under higher loads,filling with 10％ graphite could reduce wear rate of the composites more effectively.Provided with wear rate of 219.52 N,wear rate of the PTFE/cotton fabric composites filled with 5％ MoS2 decreased from 1.28 × 10-14 m3/(N ·m) to 0.6 × 10-14 m3/(N ·m) by 50％;wear rate of the composites filled with 10％ graphite decreased from 1.28 × 10-14 m3/(N · m) to 0.91 × 10-14 m3/(N · m) by 28％.Filling with graphite and MoS2 alleviates embedding and cutting effects of abrasive grains,inhibits wear of the composites and improves wear resistance of PTFE/cotton fabric composites.