These cracks may be due to inefficient interfacial bonding and surface roughness which act as crack initiation points. The SR2 composition shows some cracks after tensile loading. Figure 8b shows the smooth surface for pure silicon rubber, i.e., the SR1 composition. Figure 8a shows an SEM image of the MMT powder where the MMT particles are visible. Figure 8 shows the fracture surface morphology of all four compositions as well as the MMT powder. The surface morphology of the fractured surface is significant for getting an insight into the interfacial adhesion between the filler and matrix. Tribological properties of the graphene reinforced ceramic showed improvement because of the formation of a protective transfer layer, which acted as a lubricant between the contacting surfaces. The improvement in the tribological performance was attributed to good mechanical properties and an ability to form a protective tribofilm. The effect of the grain size and distribution of Ag2s nanoparticles on the mechanical and tribological performance was studied. The weight, COF, and wear rate of the composite can be decreased with the addition of MMT in the matrix. The authors observed that the response of both compositions to the sliding velocity was exactly contrary for the normal load. A precisely opposite behaviour was shown by the Na-MMT/PES/PTFE composite. The author attributed this to the layered structure of the Na-MMT nanoparticles. The reduction in COF was observed with a rise in the normal load for Na-MMT/PES/PTFE composites. All properties showed considerable improvement. Sodium-montmorillonite (Na-MMT) nanoparticles were added to polyethersulfone (PES)/polytetrafluoroethylene (PTFE) to understand the thermal, mechanical, and tribological properties. With increases in the concentration of MMT, the COF was found to decrease due to its lubricating behaviour. Very few researchers have explored the capability of montmorillonite (MMT) for tribological application as a filler in polymers. The rheological properties and nanoparticles dispersion were found to improve with an increase in the frequency. The sonication process for processing polyacrylamide (PMA) reinforced with clay nanoparticles was used, and the effect of the sonication time and frequency was investigated. The wear and mechanical characteristics depended on the reinforcement and agglomeration of the graphene. Solution and flocculation processes were used for the preparation of the graphene silicon composite. Ruben Sanchez-Hidalgo demonstrated that if we can control the structure, the chemical composition, and the morphology of graphene material, the property of the SR can be tailored. The author correlated this improvement with good bonding between the matrix and the filler. The sliding velocity had a similar effect on both the COF and the wear rate, and it increased with an increase in the sliding velocity. Simultaneously, the specific wear rate reduced, similar to COF, with graphite content but increased with an increase in load. The COF was observed to reduce with an increase in the wear rate and load. The enhancement of mechanical, wear, and dielectric properties due to the addition of the exfoliated graphite in silicon rubber was investigated. The wear properties of natural rubber and styrene-butadiene rubber were tested against different rocks as friction material and found to be improved. The kinetic COF of the tubular rubber seal decreases with an increasing sliding velocity and reduces the loading level. Graphite nanoplatelets improved the mechanical and abrasion resistance properties of the styrene-butadiene rubber. Reinforcement with CB enhanced the mechanical and tribological properties. Adding graphene and nano-C eO 2 as a filler in SR showed a decrease in the COF. The mechanical and wear characteristic of rubber components can be one essential factor when deciding its candidature for a particular application. The utility of SR for different applications can be improved by a deep analysis of its mechanical and tribological properties, among others.
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