WEAR BEHAVIOUR & MECHANICAL PROPERTIES OF POLYACETAL / MOLYBDENUM DISULFIDE NANOPARTICLES

WEAR BEHAVIOUR & MECHANICAL PROPERTIES OF POLYACETAL / MOLYBDENUM DISULFIDE COMPOSITES MEMBERS NAME : IRSATH AHAMED.A (110021101056) GAUTHAM KUMAR.R (11OO211O2003)

GUIDE NAME : MR.RAMANJANEYULU.G ASSISTANT PROFESSOR, MECHANICAL ENGINEERING.

ABSTRACT Polyacetal nanocomposites with various contents of molybdenum disufide were prepared by compression moulding or injection moulding process in order to study the wear behaviour and mechanical properties(hardness testing and fracture toughness,etc), respectively. The effects of content of nanoparticles and wear volume loss were investigated, respectively and these nanocomposite materials can be used in Mechanicalgears , sliding and guiding elements, housing parts,springs, chains, screws, nuts, fan wheels, pump parts, valve bodies. INTRODUCTION Polyoxymethylene (POM) resin is a kind of widely used engineering thermoplastic material, which exhibits good fatigue resistance, creep resistance and high impact strength. It has lowfriction 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, so when sliding against stainless steel it is difficult to transfer to the metal counter-surface or form wear debris in the contact area. Molybdenum disulfide (MoS2) is one of typical layered compounds,which is particularly important for solid lubrication or as an additive for lubricating oils and greases. The easy sliding between MoS2 layers is generally regarded as a significant feature for its excellent lubricity. It has been well known that nanosized MoS2 usually has better tribological properties either in friction reduction or wear resistance.LITERATURE SURVEY S.NOTITLE OF JOURNAL PAPERAUTHORCONTRIBTUTION OF THE WORKRESULTS1.Study on the friction and wear behaviorof POM/Al2O3 nanocompositesLan-Hui Suna, Zhen-Guo Yang , Xiao-Hui Li POM and Aluminium oxide are combined by twin screw extruder method.Then they conducted an amsler friction and weartester using a block-on-ring arrangement.It results in the increase of friction coefficient &especialy the wear volumeincreases 22 times.2.Tribological properties of MoS2 nano-balls as filler in polyoxymethylene-basedcomposite layer of three-layer self-lubrication bearing materialsK.H. Hua,b, J. Wangc, S. Schraubed, Y.F. Xua, X.G. Hua, R. StenglerdPOM and molybdenum disulfide nanoballs are combined together to get a composite.And they are experimented with end-face friction configuration . Better properties in friction reduction by these three-layer self-lubrication bearing materials.