Studies of Wear Behaviour of POM/Graphite and POM/MoS2 Composites

Paper #:
  • 2017-28-1988

Published:
  • 2017-07-10
Abstract:
Polyoxymethylene (POM) is a widely used engineering thermoplastic material, which exhibits good fatigue resistance, creep resistance and high impact strength. It has low friction coefficient due to the flexibility of the linear molecular chains. It has good wear-resistant properties because of its high crystallinity and high bond energy. Molybdenum disulfide (MoS2) is particularly important for solid lubrication or as an additive for lubricating oils and greases. Graphite is used in industrial applications for their self-lubricating and dry lubricating properties. POM/Graphite and POM/MoS2 composites were prepared with varying proportions using twin screw extruder. The samples were prepared by injection moulding machine. Impact test and wear tests were conducted on the samples. The impact strength of the samples was measured by impact testing machine. The impact results show that significant improvement in the impact strength for graphite and MoS2 fillers. The wear behaviour of the samples was found using pin on disc wear testing machine at various loads. The wear of the POM/MoS2 composites decreased compared to POM/Graphite composites. Microstructural study was carried out for wear samples to know the type of wear.
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