The present work aims at developing a novel superhydrophobic polymer matrix composite with enhanced wear resistance. First, polytetrafluoroethylene (PTFE) matrices were reinforced with different weight percentages (ranging from 0 to 20%) of ceria particles using the powder metallurgy method. Subsequently, the microtexture of the fabricated composites was varied by sanding them with different grit sizes of emery sheets. The effect of reinforcement was analysed on tribological behaviour of fabricated composites via a pin-on-disk test. Hydrophobic behaviour of textured PTFE and PTFE-20% ceria composite has been discussed. Surface topography and wear morphology of the polymer matrix composites were examined with an aid of SEM. Tribological data revealed that lower friction coefficient and higher wear resistance can be achieved by increasing the weight percentage of ceria particles. A maximum contact angle of 158°with a minimum roll-off angle of less than 3°was found for the PTFE-20% ceria composite.
Porous Lattice Structure (PLS) scaffolds have shown potential applications in the biomedical domain. These implants’ structural designs can attain compatibility mechanobiologically, thereby avoiding challenges related to the stress shielding effect. Different unit cell structures have been explored with limited work on the fabrication and characterization of titanium-based PLS with cubic unit cell structures. Hence, in the present paper, Ti6Al4V (Ti64) cubic PLS scaffolds were analysed by finite element (FE) analysis and fabricated using selective laser melting (SLM) technique. PLS of the rectangular shape of width 10 mm and height 15 mm (ISO: 13314) with an average pore size of 600–1000 μm and structure porosity percentage of 40–70 were obtained. It has been found that the maximum ultimate compressive strength was found to be 119 MPa of PLS with a pore size of 600 μm and an overall relative density (RD) of 57%. Additionally, the structure’s failure begins from the micro-porosity formed during the fabrication process due to the improper melting along a plane inclined at 45 degree.
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