Dry Wear Studies on Reduced Graphene Oxide Filled Uhmwpe Composites

Tribological Performance Evaluation of Hardwood Charcoal Powder Reinforced Polyester Resin with Response Surface Modelling and Optimization

“…It could be seen in Figure 7, that the wear resistance increased for all the reinforcement concentration as the reinforcement particle size was increased from 250 to 300 µm. This show that large particle sizes of reinforcement are the likely choice for the improvement of wear resistance than small ones, as they sufficiently resist the shearing force of the abrasive disc sliding on the wear specimen and prevent the ease of dislodgement of the reinforcement particles [10]. Figure 7 also revealed that the resistance offered to slide wear was higher for all the composites at 5 wt% than the unreinforced polyester, except for the 250 µm composite samples which exhibited a reduction in wear resistance at all the studied reinforcement concentrations.…”

“…It could be observed from Figure 4 also, that the wear rate for the 300 µm samples was lower than the unreinforced polyester at all reinforcement concentrations except the 30 wt%. This show that the higher the particle size of the hardwood charcoal, the better the abrasive wear properties of the hardwood charcoal/polyester matrix composites [10]. The higher wear rate observed in low filler composites could be attributed to weak interfacial interactions between the matrix and the reinforcements particles [46].…”

“…The dry sliding wear test was carried out by applying a constant load of 10 N on all the 40 mm x 10 mm x 6 mm specimens using the following procedure; initial weighing of the specimen, inserting and fixing the specimen on the specimen holder, applying the load on the supporting rod so that the stylus pin made firm contact with the specimen, switching the electric motor on to rotate the specimen for just 2000 cycles, final weighing of the specimen, and measuring the sliding distance [13]. A constant load was chosen for the tribological test because it has been demonstrated that abrasive wear of particulate reinforced polymer matrix composites depended largely on the particle sizes of the filler than on the sliding load [10]. The wear evaluation was done by expressing the friction effects in terms of material volume loss (mm 3 ) as a function of the sliding distance according to Archad formula [3,45].…”

“…𝑬𝒙𝒑𝒆𝒓𝒊𝒎𝒆𝒏𝒕𝒂𝒍 𝒅𝒆𝒏𝒔𝒊𝒕𝒚 = 1.14053 − 0.0348264𝑥 − 0.0572676𝑦 − 0.0838978𝑥𝑦 − 0.032194𝑥 2 − 0.122089𝑦 2 (10) Where X & Y are the reinforcement particle size (µm) and weight fractions (wt%) respectively.…”

“…Typical examples of this wear mechanism are wear of wheels or rails by sand particles. Polymer composite materials hold more promises for several structural and tribological applications such as wheels, rollers, clutches, gears, seal cams and bearing material [7], owing to their possession of such properties as, high stiffness and strength to weight ratio, resistance to chemical attacks, ease of fabrication, self-lubrication and low friction [5,[8][9][10][11]. According to Bagherpour, the improved properties of composites over monolithic materials, show that they majorly depend on; the properties of the components in the composite; the relative amount or concentration of different phases; the orientation of various components; the degree of bonding between the matrix and the reinforcements and the size, shape and distribution of the discontinuous/reinforcing phase [12].…”